Question 1

Which of the following sets contains only species that are isoelectronic (have the same number of electrons)?

Accepted Answer

B) N3-, O2-, F-

Question 2

How many electrons are present in the carbonate ion, $$\mathrm{CO_3$^{2-}}$$?

Accepted Answer

C) 30

Question 3

Which of the following best describes the difference between ionic and covalent bonding?

Accepted Answer

B) Ionic bonding involves a transfer of electrons and covalent bonding involves a sharing of electrons.

Question 4

Which of the following compounds is expected to exist as a molecule rather than as an ionic solid?

Accepted Answer

C) $$\mathrm{C_3H_8}$$

Question 5

Which of the following ions has the largest ionic radius?

Accepted Answer

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

Question 6

Arrange the following in order of increasing first ionization energy: Na, Cl, K, Rb, Ca.

Accepted Answer

A) Rb \u003c K \u003c Na \u003c Ca \u003c Cl

Question 7

Which of the following processes requires the most energy?

Accepted Answer

C) $$\mathrm{Mg^+(g) \rightarrow Mg$$^{2+}$$(g) + e^-}$$

Question 8

Which of the following molecules contains the most polar bonds?

Accepted Answer

A) $$\mathrm{CF_4$}$$

Question 9

Which of the following is the correct formula for thiosulfate ion?

Accepted Answer

B) $$\mathrm{S_2O_3$$^{2-}$$}$$

Question 10

Which of the following best explains why $$\mathrm{Mg$$^{2+}$$} is $$smaller than $$\mathrm{Na^+}$$?

Accepted Answer

A) $$\mathrm{Mg$$^{2+}$$}$$ has more protons and the same number of electrons as $$\mathrm{Na^+}$$, so the electrons are pulled closer.

Question 11

Which of the following is the correct Lewis structure for $$\mathrm{N_2H_2}$$?

Accepted Answer

A) $$\mathrm{H-N=N-H}$$

Question 12

Which of the following elements is most likely to form an ion with a $$2-$$ charge?

Accepted Answer

B) $$\mathrm{O}$$

Question 13

Which of the following best describes the trend in atomic radius as you move down a group in the periodic table?

Accepted Answer

B) Atomic radius increases.

Question 14

Which of the following is the correct name for $$\mathrm{$$MnCO_3$$}$$?

Accepted Answer

B) manganese(II) carbonate

Question 15

Which of the following best explains why $$\mathrm{O_2$} is a $$molecule but $$\mathrm{NaCl} is an $$ionic solid?

Accepted Answer

A) $$\mathrm{O_2$} is $$formed from two nonmetals sharing electrons, while $$\mathrm{NaCl} is $$formed from a metal and a nonmetal transferring electrons.

Question 16

Which of the following ions is isoelectronic with $$\mathrm{Ne}$$?

Accepted Answer

D) All of the above

Question 17

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

Accepted Answer

A) Electron affinity becomes more negative (increases) from left to right.

Question 18

Which of the following is the correct formula for dinitrogen tetroxide?

Accepted Answer

A) $$\mathrm{N_2O_4}$$

Question 19

Which of the following best explains why $$\mathrm{Cl_2$} is a $$gas at room temperature while $$\mathrm{NaCl} is a $$solid?

Accepted Answer

A) $$\mathrm{Cl_2$}$$ has weak intermolecular forces, while $$\mathrm{NaCl}$$ has strong ionic bonds.

Question 20

Which of the following best describes the bonding in $$\mathrm{CO_2$}$$?

Accepted Answer

A) Two double bonds between C and O

General Chemistry: Atomic Structure, Bonding, and Periodic Trends – Study Guide

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