Question 1

Which of the following best describes the formation of an ionic bond?

Accepted Answer

A transfer of one or more electrons from a metal to a nonmetal, resulting in oppositely charged ions that attract each other.

Question 2

What is the electron configuration of the oxide ion ($$O^{2-}$$)?

Accepted Answer

$$1s^2$$\ $$2s^2$$\ $$2p^6$$

Question 3

Which of the following ions does NOT have a noble gas electron configuration?

Accepted Answer

$$Ti^{3+}$$

Question 4

Compare the sizes of $$Fe$$, $$Fe^{2+}$$, and $$Fe^{3+}. $$Which statement is correct?

Accepted Answer

$$Fe is $$larger than $$Fe^{2+}$$, which is larger than $$Fe^{3+}.$$

Question 5

Why are cations generally smaller than their parent neutral atoms?

Accepted Answer

Because cations lose electrons, resulting in a smaller principal quantum number and increased effective nuclear charge ($$Z_{eff}).$$

Question 6

Which of the following ions is isoelectronic with neon ($$Ne$$)?

Accepted Answer

$$Na^{+}$$

Question 7

Which of the following statements about anions is correct?

Accepted Answer

Anions are larger than their parent atoms due to increased electron-electron repulsion.

Question 8

What is the electron configuration of $$Fe^{3+}$$?

Accepted Answer

$$[Ar]\ 3d^5$

Question 9

Which of the following ions has the largest radius?

Accepted Answer

$$I^{-}$$

Question 10

Which of the following best explains the trend in lattice energy for ionic compounds?

Accepted Answer

Lattice energy increases as the ionic charges increase and the ionic radii decrease.

Question 11

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

Accepted Answer

Neon ($$Ne)$$

Question 12

A third-row element has successive ionization energies: $$E_{i1} = 1,817\ 	ext{kJ/mol}$$, $$E_{i2} = 2,745\ 	ext{kJ/mol}$$, $$E_{i3} = 11,575\ 	ext{kJ/mol}. $$What is the most likely group for this element?

Accepted Answer

Group 2A

Question 13

Which process is described by the equation $$M(g) + e$$^{-}$$ \rightarrow M$$^{-}$$(g)$$?

Accepted Answer

Electron affinity

Question 14

Which of the following ions is isoelectronic with $$Ar$$?

Accepted Answer

$$K^{+}$$

Question 15

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

Accepted Answer

$$MgO$$

Question 16

Which of the following best explains why noble gases have very low (or zero) electron affinities?

Accepted Answer

Their valence shells are already full, so adding an electron is energetically unfavorable.

Question 17

Which of the following ions has the same number of electrons as $$N^{3-}$$?

Accepted Answer

$$Ne$$

Question 18

Which of the following statements about ionization energy is correct?

Accepted Answer

Ionization energy increases as you move across a period from left to right.

Question 19

Which of the following ions is expected to be smallest in size?

Accepted Answer

$$Na^{+}$$

Question 20

Which of the following best describes the electron configuration of $$Al^{3+}$$?

Accepted Answer

$$1s^2$$\ $$2s^2$$\ $$2p^6$$

Ionic Bonds and Electronic Configurations of Ions (CHEM101 Chapter 6 Study Notes)

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