Question 1

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

Accepted Answer

Ionic bonds involve the transfer of electrons from a metal to a nonmetal, while covalent bonds involve the sharing of electrons between two nonmetals.

Question 2

A neutral magnesium atom has 12 protons and 12 electrons. What is the formula and charge of the ion it forms to achieve a noble gas configuration?

Accepted Answer

$$\mathrm{Mg}^{2+}$$

Question 3

Which of the following compounds contains a polyatomic ion?

Accepted Answer

$$\mathrm{K_2SO_4}$$

Question 4

What is the correct name for the compound $$\mathrm{$$FeCl_3$$}$$?

Accepted Answer

Iron(III) chloride

Question 5

Which of the following best explains why $$\mathrm{CO_2$} is a $$nonpolar molecule, even though it contains polar bonds?

Accepted Answer

The molecule is linear and the bond dipoles cancel each other out.

Question 6

Which of the following is the correct formula for aluminum sulfate?

Accepted Answer

$$\mathrm{Al_2$(SO_4$)_3}$$

Question 7

A molecule of ammonia ($$\mathrm{NH_3$}) $$has which molecular shape according to VSEPR theory?

Accepted Answer

Trigonal pyramidal

Question 8

Which of the following compounds would you expect to have the highest melting point?

Accepted Answer

$$\mathrm{NaCl}$$

Question 9

What is the correct name for the molecular compound $$\mathrm{$$PCl_5$$}$$?

Accepted Answer

Phosphorus pentachloride

Question 10

Which of the following best describes a hydrogen bond?

Accepted Answer

An attraction between a hydrogen atom bonded to F, O, or N and a lone pair on F, O, or N in another molecule.

Question 11

What is the correct formula for copper(II) nitrate?

Accepted Answer

$$\mathrm{Cu(NO_3$)_2}$$

Question 12

Which of the following best explains why $$\mathrm{H_2O} is a $$polar molecule?

Accepted Answer

The molecule is bent and the dipoles do not cancel.

Question 13

Which of the following is the correct Lewis structure for $$\mathrm{F_2$}$$?

Accepted Answer

Each fluorine shares one pair of electrons, with three lone pairs on each atom.

Question 14

Which of the following is a correct name for $$\mathrm{SO_2$}$$?

Accepted Answer

Sulfur dioxide

Question 15

What is the correct formula for the compound formed between barium ions and phosphate ions?

Accepted Answer

$$\mathrm{Ba_3$(PO_4$)_2}$$

Question 16

Which of the following best describes dispersion forces?

Accepted Answer

Weak attractions between nonpolar molecules caused by temporary dipoles.

Question 17

Which of the following is the correct name for $$\mathrm{N_2O_5}$$?

Accepted Answer

Dinitrogen pentoxide

Question 18

A molecule of $$\mathrm{CH_4$} ($$methane) has which molecular geometry?

Accepted Answer

Tetrahedral

Question 19

Which of the following compounds is most likely to be a solid at room temperature due to its bonding?

Accepted Answer

$$\mathrm{Na_2SO_4}$$

Question 20

Which of the following is the correct formula for ammonium sulfate?

Accepted Answer

$$\mathrm{(NH_4$)_2SO_4}$$

Chapter 6: Ionic and Molecular Compounds – Study Notes for GOB Chemistry

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