$$2 \times 2 \times 6.022 \times 10$$^{23}$$

Question 1

Which of the following ions is written with an incorrect charge based on its position in the periodic table?

Accepted Answer

K$$^{2+}$$

Question 2

What is the correct formula for the compound formed between magnesium and chlorine?

Accepted Answer

MgCl$$_2$$

Question 3

How many total atoms are present in one molecule of Li$$_2SO$_4$$?

Accepted Answer

8

Question 4

Which of the following best describes a molecule?

Accepted Answer

A group of two or more atoms combined chemically

Question 5

Which of the following is the correct Lewis symbol for nitrogen (N)?

Accepted Answer

$$\cdot \cdot \cdot N \cdot \cdot$$

Question 6

Which of the following compounds contains both ionic and covalent bonds?

Accepted Answer

Na$$_2SO$_4$$

Question 7

What is the correct formula for the ionic compound formed between aluminum and oxygen?

Accepted Answer

Al$$_2O$_3$$

Question 8

Which of the following best explains why sodium (Na) forms a Na$$^+$$ ion?

Accepted Answer

Sodium loses one electron to achieve a stable octet

Question 9

Which of the following is a polyatomic ion?

Accepted Answer

SO$$_4$$^{2-}$$

Question 10

Which of the following correctly represents manganese (II)?

Accepted Answer

Mn$$^{2+}$$

Question 11

A patient is given a medication containing calcium nitride. What is the correct formula for this compound?

Accepted Answer

Ca$$_3N$_2$$

Question 12

Which of the following statements about transition metals is correct?

Accepted Answer

Transition metals can form ions with different positive charges

Question 13

Which of the following is the correct formula for the compound formed between lithium and oxygen?

Accepted Answer

Li$$_2O$$

Question 14

Which of the following best describes the octet rule?

Accepted Answer

Atoms tend to gain, lose, or share electrons to achieve eight valence electrons

Question 15

Which of the following is a molecular compound?

Accepted Answer

CO$$_2$$

Question 16

A sample contains 2 moles of Na$$_2SO$_4. $$How many sodium atoms are present in the sample?

Accepted Answer

$$2 	imes 2 	imes 6.022 	imes 10$$^{23}$$

Question 17

Which of the following best describes an ionic bond?

Accepted Answer

A bond formed by the transfer of electrons from a metal to a nonmetal

Question 18

Which of the following is the correct formula for the compound formed between sodium and sulfur?

Accepted Answer

Na$$_2S$$

Question 19

Which of the following is a correct statement about Lewis symbols?

Accepted Answer

Lewis symbols show only the valence electrons of an atom

Question 20

Which of the following is the correct formula for the compound formed between potassium and bromine?

Accepted Answer

KBr

Ionic and Molecular Compounds: Structure, Bonding, and Formulas

Study Guide - Practice Questions