Question 1

Which of the following elements is most likely to form a cation with a +2 charge in ionic compounds?

Accepted Answer

Mg

Question 2

A sample of an unknown gas is found to consist of diatomic molecules. Which of the following could it be?

Accepted Answer

Nitrogen

Question 3

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

Accepted Answer

NaCl

Question 4

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

Accepted Answer

Ca$$_3(PO$_4$$)$$_2$$

Question 5

Which of the following molecules is polar?

Accepted Answer

NH$$_3$$

Question 6

Which of the following best describes the bonding in Na$$_2O$$?

Accepted Answer

Ionic bonding

Question 7

Which of the following statements about the octet rule is correct?

Accepted Answer

Atoms tend to gain, lose, or share electrons to achieve a noble gas configuration.

Question 8

Which of the following best explains why water (H$$_2O) $$has a bent molecular geometry?

Accepted Answer

There are two lone pairs of electrons on the oxygen atom, causing repulsion.

Question 9

A student mixes solutions of Na$$_2SO$_4$$ and BaCl$$_2. A $$white precipitate forms. What is the identity of the precipitate?

Accepted Answer

BaSO$$_4$$

Question 10

Which of the following molecules has a trigonal planar electron geometry?

Accepted Answer

CO$$_3$$^{2-}$$

Question 11

Which of the following is the correct Lewis structure for the carbonate ion, CO$$_3$$^{2-}$$?

Accepted Answer

A central carbon atom with one double bond and two single bonds to oxygen atoms, with resonance among the oxygens.

Question 12

Which of the following best describes the type of bonding in a molecule of methane (CH$$_4$$)?

Accepted Answer

Covalent bonding

Question 13

Which of the following is NOT a property of ionic compounds?

Accepted Answer

They are malleable and ductile.

Question 14

Which of the following best explains why NaCl dissolves in water?

Accepted Answer

The polar water molecules stabilize the separated Na$$^+$$ and Cl$$^-$$ ions.

Question 15

Which of the following is the correct name for the compound Fe$$_2O$_3$$?

Accepted Answer

Iron(III) oxide

Question 16

Which of the following molecules contains a triple bond?

Accepted Answer

N$$_2$$

Question 17

Which of the following best describes the electron geometry and molecular shape of ammonia (NH$$_3$$)?

Accepted Answer

Tetrahedral electron geometry, trigonal pyramidal molecular shape

Question 18

Which of the following is a correct statement about the formation of ionic compounds?

Accepted Answer

Ionic compounds are formed by the transfer of electrons from metals to nonmetals.

Question 19

Which of the following best explains why carbon dioxide (CO$$_2) is a $$nonpolar molecule, even though it contains polar bonds?

Accepted Answer

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

Question 20

Which of the following is the correct formula for the compound formed between aluminum and sulfate ions?

Accepted Answer

Al$$_2(SO$_4$$)$$_3$$

General Chemistry: Atomic Structure, Bonding, and Molecular Geometry Study Guide

Study Guide - Practice Questions