Periodic trends graphing atomic radii answer key. d) Na Al e) O F f) Mg Ca. 21-22 Explain your answer in terms of the number of protons in the nucleus . Put the following elements in order from smallest to largest atomic radius and explain why: C, O, Sn, Sr. 2: The atomic radius (r) ( r) of an atom can be defined as one half 4. Periodic radius atomic rank increasing geSolved worksheet part i: periodic trends atomic radius the Periodic table trends worksheet answer key atomic radiusSolved periodic trends worksheet 1) rank in increasing. Introducing the dynamic "Graphing Atomic Radius" worksheet, a must-have resource for high school chemistry classes. No. Periodic webquest studylib elements excelExploring the periodic table worksheet answer key . Quiz & worksheet [ See end of Answer Key for answers to A – D. So if the atomic radius increases this also increases. b) Ca or Ni c) Ga or B d) O or C. In this activity, students will view an animation that explores atomic and ionic radii. ANSWER KEY Periodic Trends Worksheet 1. f) Be or Ba g) Si or S. What trends do you notice for the atomic radii of Group 2A? To the left is a table of the atomic radii for selected elements. ] A. 1Atomic radii are usually given in units of picometers (pm = 10–12 m) or Ångstroms (Å = 10–10 m). Apr 1, 2024 · Trends periodic radius atomic worksheet answer key table reactivity. Jan 28, 2019 · For example, first-year students will understand that atomic radius increases from top to bottom down a group and decreases from left to right across a group, where advanced or AP students can combine two trends to conclude that atomic radius increases diagonally from top right to bottom left. b) There is a general trend in atomic radius down the table, it increases as you go down a group. On the graph to the right of your screen, go to the drop-down menus below x and y (this is where you can choose the value for your x-and y-axis). Be sure Mar 14, 2024 · Periodic atomic radius table trends groups worksheet across periods quiz within answer key tpt worksheets teaching resourcesPeriodic table worksheet groups periods quiz atomic properties radius ionic trends study answers radii practice Periodic trends atomic radius worksheet answer keyAll periodic trends in periodic table (explained with image). Periodic trends graphing activity previewExploring the periodic table worksheet answer key Trends graph worksheetPeriodic zeff radius elements. Worksheets are Graphing trends in the periodic table, Lab 10 graphing periodic trends answers, Graphi Dec 12, 2023 · Summary. Atomic radius Atomic radius Atomic radius of elements. 1: (left) Covalent Radii, (middle) Ionic Radii, (right Graphing Periodic Trendswaterford High School. atomic number (x-axis). 2 Group 2A Element Atomic Number Atomic Radius Be 4 1. Which of the following will have a larger radius than Zinc? 3. Study with Quizlet and memorize flashcards containing terms like Rank the following elements by increasing atomic radius: Carbon, Aluminum, Oxygen, Potassium, Rank the following elements by increasing electronegativity: Sulfur, Oxygen, Neon, Aluminum, Why does fluorine have a higher ionization energy than iodine? and more. This simulation supports the following unit, topics and learning objectives: Unit 1: Atomic Structure and Properties. The Periodic Table is arranged according to Periodic Law. As you move from left to right across a period, the atomic radius tends to decrease. Dec 9, 2023 · PERIODIC TRENDS GRAPHING PROJECT Graph the data for the following characteristics of … WebPeriodic Trends Worksheet 1. Shell 3: 18 electrons. atomic radius vs atomic number (elements 1-18) Atomic Radius (angstrom 05 1 2 3 5 5 Jun 11, 2021 · Jessica Martin, Northeastern State University. May 20, 2023 · Atomic worksheet periodic radius correctPeriodic atomic radius increases understood Radius atomic periodic trends worksheet answer key reactivity tpt worksheets teaching resourcesPeriodic atomic radius trend period energy table radii trends ionization chemistry electron find increase behavior affinity charge pattern where sliderbase. Periodic trends webquest and graphing answer key. 76 Å. Ba 56 2. (Credit: Christopher Auyeung; Source: CK-12 Foundation; License: CC BY-NC 3. Sep 9, 2022 · In this simulation, students can investigate the periodic trends of atomic radius, ionization energy, and ionic radius. 1 Å = 100 pm. Using only a periodic table, predict the order of increasing atomic radius for each of the following sets of elements: Ca, Mg, Be Be < Mg < Ca Ga, Br, Ge Br < Ge < Ga Al, Tl, Si Si < Al < Tl Zn, Cd, Fe Fe < Zn < Cd 2. 17 Sep 24, 2023 · The graphing periodic trends answer key PDF provides a comprehensive guide on how to graph and interpret periodic trends. Plot atomic number on the X Mar 26, 2024 · Check Details Periodic worksheet table groups periods quiz atomic properties radius ionic trends study answers radii practice. This makes the activity applicable for varying levels. 48 Å. The. Circle each point and label it with the symbol of each element. And second helium 49. 11 Mg 12 1. You want to be able to choose which elements, groups, and periods will be graphed to answer this Study with Quizlet and memorize flashcards containing terms like The atomic radii cannot be measured directly because the electron cloud surrounding the nucleus does not have a clearly defined. This captivating worksheet challenges students to create a line graph depicting the atomic numbers and ionization energies of the first 36 elements. In the Periodic Trends Gizmo, you will explore this relationship and how it affects the properties of different elements. You are making two separate graphs and the vertical scale for each will be quite different. Which atom in each pair has the larger atomic radius? Circle your answer. Graph 2 o For elements 1-36, make a graph of the ionization energy. Using the data below, make a bar graph of atomic radius vs. For the vertical arrow, indicate the trend for atomic radius (AR), ionization energy (IE) and electron affinity (EA) by writing next to the arrow whether each property increases or decreases. The Periodic Law states that when elements are arranged in order of increasing atomic … WebCreated Date: 11/3/2015 3:20:46 PM WebSet A Figure 6. Turn on Show ruler. Circle the atom in each pair that has the largest atomic radius. Atomic radius is a key periodic trend that describes the size of an atom. 25. Periodic Trends: Graphing Atomic Radii. outermost electron. On the bottom, plot a separate graph of atomic radius vs. For each graph connect successive dots with straight lines. This captivating worksheet challenges students to create a line graph depicting the atomic numbers and atomic radii of the first 36 elements. 2 2. Predict If a halogen and an alkali metal are in the same period, which one will have the larger radius? Figure 6. The periodic trends, which include atomic radius, ionization energy, electron affinity, and electronegativity, provide valuable information about the reactivity and chemical properties of elements. 0:30 2:53 So here we have a graph of atomic radius on the y axis. Sr 38 2. 3. Shell 1: 2 electrons. e) Cl or Br. 2: The atomic radius (r) ( r) of an atom can be defined as one half the distance (d) ( d) between two nuclei in a diatomic molecule. Figure 2. Jan 28, 2024 · Check Details Periodic assignment graph atomic exp. Which element has the highest atomic selected elements. A: Represent the electron configuration of an element or ions of an element using the Aufbau principle. Students can also attempt to ionize an atom by removing its valence electrons. Introducing the dynamic "Graphing Electronegativity" worksheet, a must-have resource for high school chemistry classes. Aug 30, 2021 · Many periodic trends are general. 5: Atomic Structure and Electron Configuration. Atomic Radius. 8. Across a period, atomic radii decrease. What trends can you observe and explain in the first 1. These numbers represent the atomic radii. 16W. 77 Å) and chlorine (0. Dec 21, 2023 · the periodic table; Atomic Radius and Metallic Properties, which increase as one moves down and to the left on the periodic table; and Electron Afinity, Electronegativity, and Ionization Energy, which increase as one moves up and to th Weblegacy. Armed with provided graph paper and Jun 18, 2023 · Periodic solved atomic radius worksheet trends part transcribed problem text been show hasName: #: ___date: worksheet: periodic trends 1. Armed with provided graph pape Students determine the trend of atomic radii by graphing. 8 Best Images of Graphing Quadratic Inequalities Worksheets - Solving. Graphing Periodic Trends. This is an activity meant to have students track and compare changes in electronegativity and atomic radius across a period and down a group. The experimentally determined distance is 1. Such radii can be estimated from various experimental techniques, such as the x-ray crystallography of crystals. What trends do you notice for the atomic radii of Group 2A? Mar 8, 2024 · Atomic Radius Graphing Activity. Plot atomic number on the X-axis and the atomic radius on the Y-axis. By choosing elements from the periodic table, atoms can be selected for a side by side comparison and analysis. The first periodic trend we will consider is atomic radius. Ionization energy and atomic radius should be plotted on the vertical axis. 1. easy trends worksheet and key periodic trends worksheet name using the data below, make bar graph of atomic radius vs. Periodic trends are specific patterns observed among the chemical elements of the periodic table. Atomic radius and ionic radius chemistry doodle diagramsPeriodic trends Atomic radiusRadius atomic periodic table trends. Define atomic radius:(look up in your notes or text or online!) The atomic radius of an element is the distance between the nucleus and the edge of the electron cloud. Apr 23, 2024 · Atomic radius trend radii period trends across left right decrease pte prepscholarUnderstanding atomic radius trends: the 2 key principles Periodic table drawing atomic radius trends answer key paintingvalley studylibPeriodic atomic radius table trends groups worksheet across periods quiz within answer key tpt worksheets teaching resources. Here’s the best way to solve it. The atomic radius is a measure of the size of the electron cloud , or the region where electrons can be found. Examine the charts above. Many of the trends in the periodic table are useful tools for predicting electronic properties and chemical reactivities of various Jun 20, 2015 · The noble gases are left out of the trends in atomic radii because there is great debate over the experimental values of their atomic radii. These observed patterns allude to the changes in atomic structure, including size and radius, as well as properties of the elements. Although the concept of Figure 2. Given Apr 15, 2024 · Trends in the periodic table graphing worksheet answersAtomic radius periodic worksheets worksheet trends quadratic graphing inequalities worksheeto via Periodic solved atomic radius worksheet trends part transcribed problem text been show hasPeriodic trends atomic radius worksheet answer key. ( 31 votes) The radius of an atom describes the distance between the nucleus and the Two atoms bonded together. 16 Trends in Atomic Size The size of atoms tends to decrease from left to right across a period and increase from top to bottom within a group. 60 Ca 20 1. Name _____ 1. Dec 16, 2023 · WebGraphing Periodic Trends Worksheet Answerkey Web1. What are Periodic Trends. a) Li or K. The atomic radius is defined as one-half the distance between the nuclei of identical atoms that are bonded together. As we compare the elements down the group, the effective nuclear charge increases, but at the same time the outermost electrons are found in the shell that is farther away from the nucleus. Jul 15, 2023 · Periodic trends graphing key answer answers chemistry properties lab pdffiller science Trends periodic graphing lab Graphing periodic properties answer key. One way of measuring the atomic radius is to d. ELECTRONEGATIVITY. To begin, check that H (hydrogen) is selected in Group 1 on the left. 1nm = 1 × 10 − 9m and 1pm = 1 × 10 − 12m. Periodic atomic chegg graphing radius brokeasshome. Figure 7. Use the periodic table, charts, and your knowledge of periodic trends to answer the following questions. Dec 28, 2023 · Graphing Periodic Trends Lab Answer Key WebPRE-LAB DISCUSSION: The Periodic Table is arranged according to the Periodic Law. It takes you step-by-step through the process of creating graphs to represent various periodic properties, such as atomic radius, ionization energy, and electronegativity. Students can discover these patterns by examining the changes in properties of elements on the Periodic Table. These numbers represent the atomic. atomic number for Group 2A and for Period … WebGraphing Periodic Trends. Periodic Trends: Graphing Atomic Radii Source: Glencoe/McGraw-Hill pp. This activity supports the following unit, topics and learning objectives: Unit 1: Atomic Structure and Properties. atomic number for group 2a and for period. atomic radius a measurement of the size of an atom, usually expressed in picometres (pm); the distance from the centre of an atom to the outermost electrons Figure 2 Atomic radius is a periodic trend. The properties that will be examined in this lesson are: atomic radius AND Graphing periodic trends worksheets answersPeriodic trends worksheet draw the trend for atomic radius Periodic worksheet trends answers atomic worksheets size radius chemistry circle honors largest element put doc square around sponsored links studylibPeriodic trends worksheet — db-excel. The atomic radius is an indication of the size of an atom. List their atomic radii below (pm = picometer or 1 x 10 In the Periodic Trends Gizmo, you will explore this relationship and how it affects the properties of different elements. D)Sr. 5: Atomic Structure and Electron Configurations. . Make a graph showing Atomic Radius (pm) on the Y-axis and Atomic Number on the X-axis . 4. upenn. 17 Jun 12, 2023 · Radius worksheet ionic trends answers atomic periodic pdfPeriodic atomic radius table trends groups worksheet across periods quiz within answer key tpt worksheets teaching resources 'periodic trends: atomic radius' chemistry worksheet printable pdf downloadWorksheet periodic trends atomic radius date name practice following studylib. Label the peaks and troughs with the correct element. On the graph paper, label the horizontal axis with the numbers 0-38 to represent the. 2. Putting the trends together, we obtain Kr < Br < Ge < Fl. C3AWAM. r observe the distance between bonding atoms. This distance is very small so it is often reported in picometers (10-12 m) or angstroms (10-10 m). 6. of the atomic radii of carbon (0. atomic numbers of the elements you will be plotting. 15 This graph plots atomic radius versus atomic number for elements with Graphing Periodic Trends DIRECTIONS: Draw a line in the middle of a piece of graph paper, separating the page into top and bottom. Mar 12, 2013 · The atomic radius is defined as one-half the distance between the nuclei of identical atoms that are bonded together. following plot shows how atomic radii vary through the periodic table. On the top, plot a graph of ionization energy (y-axis) vs. There may be a few points where an opposite trend is seen, but there is an overall trend when considered across a whole row, or down an entire column of the periodic table. Periodic trends worksheet — db-excel. Periodic trends charts for chemistry. 3 . There are many trends on the periodic table. ldi. As you move from left to right across a period, the atomic radius Name: KEY Periodic Trends Worksheet Atomic Radius 1. F)O. 18) Rok Namber 1. On the representation of the periodic table below. Use the graph to answer The Periodic Law states that when elements are arranged in order of increasing atomic number, their physical and chemical properties show a periodic pattern. Which has the greater electronegativity? Cl or Al? 2. In order to standardize the measurement of atomic radii, the distance between the nuclei of two identical atoms bonded together is measured. Graphing trends answer exempla Periodic table trends worksheet answer key atomic radius Graphing trends answer exempla periodic table. Why do you place the atomic number on the x-axis instead of the y-axis? Dec 8, 2021 · 3. Atomic radii have been measured for elements. Sorting Atomic Radii Predict the order of increasing covalent radius for Ge, Fl, Br, Kr. Periodic Trends. a a a a ‹ ‰ ‡ † „ ‚ € ~ ´ ¶ ´ ¶ ~ a ‚ ?” What trend in atomic radius occurs down a group on the periodic table? What causes this trend? Atomic radius decreases down the group on the periodic table. 7: Periodic Trends. And atomic number on the x axis. 97 Sr 38 2. Draw 2 a rrows (next to and below) to represent increasing atomic radius . 766 Å. Ionization Energy Trend Trend Down Group Trend Across Period Deviations (if any) What the graph says: Ionization energy decreases as you go down a group. (b) Covalent radii of the elements are shown to scale. The atomic radius for the halogens increases down the group as n increases. angelb1020. atomic number. Turn on Show ruler . When you have finished plotting points, connect the plotted data to create a line graph. Click here for details. Be sure that the Scatter/Box/Bar or Categorical Bubble icon is selected. The units for atomic radii are picometers, equal Jan 29, 2024 · AP Chemistry Curriculum Framework. Periodic worksheet trends answers atomic radius key answer worksheets table size chemistry review circle doc largest topic element put Atomic Radii. Jan 4, 2024 · One of the most well-known trends in the periodic table is the periodicity of atomic radius. This is because while the number of electrons increases down the period, they only add to the same main energy level, and therefore do not Sep 23, 2022 · Many periodic trends are general. Graphing trends in the periodic table worksheet answersPeriodic zeff radius elements Periodic graphingPeriodic graphing. Periodic behaviorPeriodic atomic radius trend period energy table radii trends ionization chemistry electron find increase behavior affinity charge pattern where sliderbase All periodic trends in periodic table (explained with image)Periodic trends atomic radius worksheet answer key. 0 (opens in new window)) Atomic radii have been measured for elements. atomic number for Group 2A and for Period 3 of the periodic … WebGraphing periodic trends worksheet answer key 1: Periodic Trends Worksheet (advanced) - Chemistry LibreTexts History Of The Periodic Table Reading Assignment Answers … Jan 12, 2024 · Periodic excel worksheet trends dbPeriodic graphing atomic brokeasshome radius chegg Periodic table trends worksheet answer key atomic radiusPeriodic key trends answer table answers worksheet info. Ca 20 1. Ionic radius atomic chemistry periodicity ions across ppt powerpoint presentation downRadius ionic periodic ions Master the periodic trends like atomic radius, ionic radius, ionizationIonic atomic radius radii atom atoms relative electron sciencenotes. Start by clicking the “Deselect All” button above the miniature periodic table. Solution Radius increases as we move down a group, so Ge < Fl (Note: Fl is the symbol for flerovium, element 114, NOT fluorine). Students can discover these patterns by examining the Period Trends. Lab Assignment Part I: Periodic Trends Atomic Radius The graph below plots the atomic radius versus the atomic number for the first 18 elements of the periodic table. 10. com. 5. Graph the Atomic Radius for each element in Period 2 in one color. The Periodic Law states that when elements are arranged in order of increasing atomic number, their physical and chemical properties show a periodic pattern. One graph has ionization energy as the vertical axis, one graph has atomic radius as the vertical axis. Check Details. 15 Ba 56 2. Quantitative data is available for Introducing the dynamic "Graphing Atomic Radius" worksheet, a must-have resource for high school chemistry classes. 2. Atomic radius increases. E)Cl. B. The units for atomic radii are picometers, equal to 10 -12 meters. Periodic solved atomic radius worksheet trends part transcribed problem text been show has Radius periodic Periodic atomic radius trend period energy table radii trends ionization electron find increase behavior chemistry affinity where pattern sliderbase presentation 5. 0 license and was authored, remixed, and/or curated by LibreTexts. Graphing Periodic Trends Answer Key. (a) The radius of an atom is defined as one-half the distance between the nuclei in a molecule consisting of two identical atoms joined by a covalent bond. SAP-1. Give your best and most concise explanation of the following trends: a) There is a general trend in atomic radius across the table; it decreases as you go from left to right across a period. Label the metals and the nonmetals. atomic radius 32 periodic trends worksheet atomic radius answersPeriodic trends. 99 Å), which is 1. Apr 1, 2024 · Graphing trends Answer Exempla. Atomic radius is the distance from the atom’s nucleus to the outer edge of the electron cloud. Q-Chat. How does atomic radius change as you move from top to bottom in a group? Explain your answer in terms of the number of electron shells . Shells 5 through 7: 32 electrons in any known element, however there are additional orbitals available to hold even more electrons, but there is no element with a large enough atomic number to fill up those slots. Be sure to complete the key. Although the concept Sep 13, 2023 · Lesson 10 atomic radius and the periodic table Radius atomic periodic compared atom nucleus Periodic table drawing radius atomic trends answer key paintingvalley studylib. atomic number for Group 2A and for Period 3 of the periodic table. Some of Sep 12, 2023 · Periodic trends atomic radius worksheet answer keyPeriodic atomic radius table trends groups worksheet across periods quiz within answer key tpt worksheets teaching resources Periodic atomic radius trend period energy table radii trends ionization electron find increase behavior chemistry affinity where pattern sliderbase presentationPeriodic Jul 28, 2023 · Radius atomic ions table chem periodic chemistryRadius worksheet ionic trends answers atomic periodic pdf Radius atomic diagrams doodleUnderstanding atomic radius trends: the 2 key principles. Periodic Webquest Trends Use an interactive periodic table (see link below) to study the trends of atomic radius, energy ionization and electroneattiness during the period and down the group in the periodic table. Periodic trends atomic radius worksheet answer keyRadius atomic periodic increases Worksheet atomic periodic trends radius date Ionic radius is the distance away from the central atom. Topic 1. Label the vertical axis by ten with numbers 0- 280. These changes occur within their respective period from left to right and group from top the relative sizes of the atoms and examine the periodic trends associated with this property. Label each point with the corresponding element symbol. So for the first element the radius is 79 picometers let's put that point on. The atomic radius (r) of an atom can be defined as one-half the distance (d) between two nuclei in a diatomic molecule. Shell 2: 8 electrons. There may be a few points where an opposite trend is seen, but there is an overall trend when considered across a whole row or down a whole column of the periodic table. Click the Show buttons beneath Atomic Number and Atomic Radius. edu, Graphing Trends In The Periodic Table Lab Answers Key PDF eBook download haven Jan 29, 2024 · AP Chemistry Curriculum Framework. Essential Concepts: Periodic trends, group, period, electronegativity, atomic radius. Chemistry questions and answers; Worksheet Part I: Periodic Trends Atomic Radius The graph below plots the atomic radius versus the atomic number for the first 18 elements of the periodic table. Shell 4: 32 electrons. Figure 1: (a) The radius of an atom is defined as one-half the distance between the nuclei in a molecule consisting of two identical atoms joined by a covalent bond. On the graph, plot the atomic radius vs. For x, under atomic properties, choose atomic number. Radius decreases as we move across a period, so Kr < Br < Ge. They will also look at an atom and its corresponding cation as well as an atom and its corresponding anion. The atomic radius is a measure of the size of the electron cloud, or the region where electrons can be found. radii. Once the dataset is open, click on the Graph tab at the top of the screen to switch to graph view. 17 Atomic Radius Atomic Number Aug 19, 2020 · Figure 2. Study with Quizlet and memorize flashcards containing terms like as we go down a group, atomic radius, As we go right, electronegativity, Atomic radius increases where and more. 7. Although the concept Sep 27, 2022 · Many periodic trends are general. This captivating worksheet challenges students to create a line graph depicting the atomic numbers and pauling scale values of the first 36 elements. Exp 9. Use a colored pen or pencil to draw a vertical line that represents the beginning of each period. Mg 12 1. a) Al B b) S O c) Br Cl. On the same graph, graph the atomic radius for each element in Period 3 in a second color, Period 4 in a third color and period 5 in a fourth color. May 16, 2023 · Radius atomic periodic atom compared nucleusPeriodic atomic radius electronegativity increases decreases periodictableguide understood Worksheet atomic radius answers ionic pdffiller formPeriodic table drawing radius atomic trends answer key paintingvalley studylib. The same trend as the Atomic Radius trend, so this also decreases. Group 2A Element Atomic Number Atomic Radius Be 4 1. Trends in the Periodic Table I - Atomic and Ionic Radius (Worksheet) is shared under a CC BY-NC-SA 4. May 7, 2023 · Answers Key Periodic Trends Worksheet Answer Key Periodic Table. The SI units for measuring atomic radii are the nanometer (nm) and the picometer (pm). , which diagram best represents the group and period trends in atomic radii in the periodic table?, the general trend in the radius of an atom moving down a group is partially accounted for by the Feb 20, 2024 · Periodic trends: graphing atomic radii Trends in the periodic table graphing worksheet answers. For y, under atomic properties, choose atomic radius. Dec 23, 2023 · new WebGraphing Periodic Trends Lab Answer Key Web“Graph/Table” button in the upper right corner. Showing 8 worksheets for Atomic Radius Graphing. Although the concept of a definite radius of an atom is a bit fuzzy, atoms behave as if they have a certain radius. Examine the trend in atomic radius from left to right across a period by clicking on all the elements in the 2 nd period. Go and click on the property tab at the top left of the screen. Plot the atomic radius for each of the elements with atomic numbers 3-38. So for theMoreSo here we have a graph of atomic radius on the y axis. Students will have to create connects between periodic trends and electron configuration. o For elements 1-36 make a graph of atomic radius as a function of atomic number. Multiple Choice. Electron-electron repulsions: due to their like charges, electron pairs orient themselves as far away as possible from each other, causing the electron cloud to expand (justifies trends across a period). For example, ionization energy, electronegativity, and of course atomic radius which we will discuss now. The experimentally determined Bi–Cl bond distance in bismuth trichloride is 2. Trends in the periodic table graphing worksheet answersPeriodic table trends worksheet answer key atomic radius Periodic trends graphing activity previewPeriodic chemistry excel gizmo studyres s1 producing chessmuseum. 7. Armed with provided graph paper and a help Periodic Trends Key Questions 1. Use this graphing feature to answer the questions below. They will look at the different sizes of atoms in the third period and the atoms in the sixth group to see trends across periods and down groups. This can be visually represented on a graph by plotting the atomic number along the x-axis and the atomic radius along the y-axis. Answer key: Included in the chemistry instructor resources subscription. arom radius vs atomie numer (elements 1. hg iy ti np zb ej ol tp cy lh