Question 1

Which of the following best describes the process by which a sodium atom becomes a sodium ion?

Accepted Answer

It loses one electron to achieve a noble gas configuration.

Question 2

A neutral atom of magnesium (Z = 12) forms a cation. What is the electron arrangement of the resulting Mg2+ ion?

Accepted Answer

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

Question 3

Which of the following pairs are both isoelectronic and isotopic?

Accepted Answer

$^{40}_{20}Ca^{2+}$\ and\ ^{40}_{18}Ar$

Question 4

Which of the following ions has 28 electrons, a mass number of 65, and 35 neutrons?

Accepted Answer

$^{65}Zn^{2+}$

Question 5

What is the systematic name for the ion $Fe^{3+}$?

Accepted Answer

Iron (III) ion

Question 6

Which of the following compounds is expected to have the lowest boiling point?

Accepted Answer

SO$_2$

Question 7

What is the correct formula unit for a compound formed by $Mg^{2+}$ and $SO_4^{2-}$?

Accepted Answer

$MgSO_4$

Question 8

Which of the following best describes the dominant intermolecular force between $KCl$ and $CH_3OH$ in solution?

Accepted Answer

Ion-dipole forces

Question 9

Which of the following molecules is nonpolar?

Accepted Answer

CO$_2$

Question 10

What is the ideal bond angle in a molecule with four electron groups and no lone pairs on the central atom?

Accepted Answer

$109.5^\circ$

Question 11

Which of the following correctly identifies the chemical bond between two bromine atoms?

Accepted Answer

Pure covalent

Question 12

Which of the following ions is a polyatomic cation?

Accepted Answer

$NH_4^+$

Question 13

Which of the following best describes the geometry of $CS_2$?

Accepted Answer

Linear

Question 14

Which of the following species is expected to have the largest London dispersion forces?

Accepted Answer

$C_{12}H_{26}$

Question 15

Which of the following is the correct systematic name for $NO_2^-$?

Accepted Answer

Nitrite

Question 16

Which of the following best describes the dominant force responsible for the condensation of water vapor?

Accepted Answer

Intermolecular force

Question 17

Which of the following is the correct name for the compound $Al(BrO_4)_3$?

Accepted Answer

Aluminum perbromate

Question 18

Which of the following best describes the molecular geometry of $NH_4^+$?

Accepted Answer

Tetrahedral

Question 19

Which of the following is the correct formula for the thiosulfate ion, given that 'thio' means replacing one oxygen with a sulfur in sulfate ($SO_4^{2-}$)?

Accepted Answer

$S_2O_3^{2-}$

Question 20

Which of the following intermolecular forces is present in all molecules?

Accepted Answer

London dispersion forces

Ionic and Molecular Compounds: Structure, Properties, and Bonding

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