Question 1

Which of the following statements best explains why atomic radii decrease across a period from left to right?

Accepted Answer

The nuclear charge increases, pulling electrons closer to the nucleus.

Question 2

Which of the following ions has the largest radius?

Accepted Answer

$\mathrm{O^{2-}}$

Question 3

Which element below has the highest first ionization energy?

Accepted Answer

$\mathrm{F}$

Question 4

Which of the following best describes the trend in electron affinity across a period?

Accepted Answer

Electron affinity becomes more negative.

Question 5

Which of the following elements is most likely to have a positive electron affinity?

Accepted Answer

$\mathrm{Ne}$

Question 6

Which of the following compounds is expected to have the greatest lattice energy?

Accepted Answer

$\mathrm{MgO}$

Question 7

Which bond is expected to be the most polar?

Accepted Answer

$\mathrm{O-H}$

Question 8

Which of the following pairs of elements would form the most ionic bond?

Accepted Answer

$\mathrm{Na}$ and $\mathrm{Cl}$

Question 9

Which of the following is the correct balanced chemical equation for the electron affinity of chlorine?

Accepted Answer

$\mathrm{Cl + e^- \rightarrow Cl^-}$

Question 10

Which of the following elements is the most electronegative?

Accepted Answer

$\mathrm{F}$

Question 11

Which of the following statements about metallic character is true?

Accepted Answer

Metallic character increases down a group.

Question 12

Which of the following bonds is strongest?

Accepted Answer

Triple bond

Question 13

Which of the following factors most strongly affects the magnitude of lattice energy in an ionic solid?

Accepted Answer

Ion size and ion charge

Question 14

Which of the following elements has the lowest first ionization energy?

Accepted Answer

$\mathrm{K}$

Question 15

Which of the following statements about ionic and covalent bonding is correct?

Accepted Answer

Ionic bonding involves transfer of electrons, while covalent bonding involves sharing of electrons.

Question 16

Which of the following elements has the most negative electron affinity?

Accepted Answer

$\mathrm{F}$

Question 17

Which of the following compounds is expected to have the highest melting point?

Accepted Answer

$\mathrm{MgCl_2}$

Question 18

Which of the following best describes the relationship between bond length and bond strength?

Accepted Answer

Shorter bonds are stronger.

Question 19

Which of the following elements is most likely to lose an electron to form a cation?

Accepted Answer

$\mathrm{Na}$

Question 20

Which of the following statements about the second ionization energy is correct?

Accepted Answer

The second ionization energy of Na is greater than the first ionization energy of Na.

Chapter 6 Student Notes

Study Guide - Practice Questions