6.5 Periodic Variations in Element Properties

Why atomic and ionic radii, ionization energy, and electron affinity shift across a period and down a group, traced to nuclear charge and shielding.

Chemistry 2e, 6.5 Periodic Variations in Element Properties

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10 exercises

6.5 Exercise 1

Based on their positions in the periodic table, predict which has the smallest atomic radius: Mg, Sr, Si, Cl, I.

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6.5 Exercise 3

Based on their positions in the periodic table, predict which has the largest first ionization energy: Mg, Ba, B, O, Te.

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6.5 Exercise 5

Based on their positions in the periodic table, rank the following atoms in order of increasing first ionization energy: F, Li, N, Rb

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6.5 Exercise 7

Atoms of which group in the periodic table have a valence shell electron configuration of ns²np³?

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6.5 Exercise 9

Based on their positions in the periodic table, list the following atoms in order of increasing radius: Mg, Ca, Rb, Cs.

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6.5 Exercise 11

Based on their positions in the periodic table, list the following ions in order of increasing radius: K⁺, Ca²⁺, Al³⁺, Si⁴⁺.

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6.5 Exercise 13

Which atom and/or ion is (are) isoelectronic with Br⁺: Se²⁺, Se, As^–, Kr, Ga³⁺, Cl^–?

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6.5 Exercise 15

Compare both the numbers of protons and electrons present in each to rank the following ions in order of increasing radius: As^3–, Br^–, K⁺, Mg²⁺.

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6.5 Exercise 17

Of the five elements Sn, Si, Sb, O, Te, which has the most endothermic reaction? (E represents an atom.) What name is given to the energy for the reaction?
$\text{E} \left(g\right) \rightarrow \text{E}^{+} \left(g\right) + \text{e}^{-}$

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6.5 Exercise 19

Which main group atom would be expected to have the lowest second ionization energy?

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