Chemistry > GIZMOS > periodic trends Gizmos... graded A+ (All)

periodic trends Gizmos... graded A+

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Directions: Follow the instructions to complete your group's section of the simulation. Respond to the questions and prompts in the orange boxes. New Vocabulary: atomic radius, electron affinity, el... ectron cloud, energy level, group, ion, ionization energy, metal, nonmetal, nucleus, period, periodic trends, picometer, valence electron 2. Which magnet would be most likely to attract additional paper clips? 3. What is the relationship between the thickness of the book and the ability of the magnet to hold on to and attract paper clips? Just as the thickness of a book changes how strongly a magnet attracts a paper clip, the size of an atom determines how strongly the nucleus attracts electrons. In the Periodic Trends Gizmo, you will explore this relationship and how it affects the properties of different elements. Part One: Atomic Radius------------------------------------------------------------- The atomic radius is a measure of the size of the electron cloud, or the region where electrons can be found. To begin, check that H (hydrogen) is selected in Group 1 on the left. Turn on Show ruler. To measure the radius, drag one end of the ruler to the proton in the nucleus and the other end to the electron. Click Save radius to record the value. 1. What is the radius of hydrogen? Notice that the radius is measured in picometers (pm). A picometer is one trillionth of a meter. 2. On the right side of the Gizmo, select Li. Connect the right side of the ruler to the outermost electron, or valence electron. What is the radius of lithium? Activity A: Atomic radius Get the Gizmo ready: ● Check that Atomic radius is selected from the drop-down menu. mason cowell Date: 10/5/2020 Magnet B because it’s magnetic pull is strong 53 167 atomic radius increases as you move down a group. [Show More]

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