Question 1

Which of the following best describes an anion?

Accepted Answer

An atom that has gained one or more electrons and has a negative charge.

Question 2

Which of the following is the correct formula for magnesium chloride?

Accepted Answer

$$\mathrm{$$MgCl_2$$}$$

Question 3

What is the correct name for the compound $$\mathrm{Na_2SO_4}$$?

Accepted Answer

Sodium sulfate

Question 4

Which of the following statements about ionic bonds is correct?

Accepted Answer

Ionic bonds form due to the electrostatic attraction between oppositely charged ions.

Question 5

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

Accepted Answer

$$\mathrm{(NH_4$)_3PO_4}$$

Question 6

Which of the following best explains why sodium forms a $$+1$$ ion?

Accepted Answer

Sodium has one electron in its outer shell and loses it to achieve a noble gas configuration.

Question 7

Which of the following is a correct Lewis structure for water ($$\mathrm{H_2O}$$)?

Accepted Answer

Oxygen atom in the center with two single bonds to hydrogen atoms and two lone pairs on oxygen.

Question 8

Which of the following compounds is most likely to be ionic?

Accepted Answer

$$\mathrm{NaCl}$$

Question 9

What is the correct name for $$\mathrm{Fe_2O_3}$$?

Accepted Answer

Iron(III) oxide

Question 10

Which of the following best describes electronegativity?

Accepted Answer

The ability of an atom to attract electrons in a chemical bond.

Question 11

Which of the following molecules is polar?

Accepted Answer

$$\mathrm{H_2O}$$

Question 12

A patient is given a medication containing calcium ions. Which of the following is the correct formula for calcium nitrate?

Accepted Answer

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

Question 13

Which of the following best describes a covalent bond?

Accepted Answer

A bond formed by the sharing of electrons between two nonmetals.

Question 14

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

Accepted Answer

$$\mathrm{N_2O_4}$$

Question 15

Which of the following is the correct name for $$\mathrm{$$PCl_5$$}$$?

Accepted Answer

Phosphorus pentachloride

Question 16

Which of the following best explains why $$\mathrm{CO_2$} is a $$nonpolar molecule?

Accepted Answer

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

Question 17

A solution contains $$\mathrm{K^+}$$ and $$\mathrm{NO_3$^-}$$ ions. What is the correct formula for the compound formed?

Accepted Answer

$$\mathrm{$$KNO_3$$}$$

Question 18

Which of the following is the correct name for $$\mathrm{SO_3$}$$?

Accepted Answer

Sulfur trioxide

Question 19

Which of the following best describes the octet rule?

Accepted Answer

Atoms tend to gain, lose, or share electrons to achieve eight electrons in their valence shell.

Question 20

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

Accepted Answer

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

Study Guide: Ionic and Molecular Compounds (Chapters 3-4)

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