Question 1

How many electrons can the $$p$$ subshell hold?

Accepted Answer

$$6$$

Question 2

An atom has $$17$$ protons and $$18$$ electrons. What is the correct symbol for this ion?

Accepted Answer

$$\mathrm{Cl}^-$$

Question 3

How many valence electrons does a nitrogen atom have?

Accepted Answer

$$5$$

Question 4

Which of the following bonds is the most polar?

Accepted Answer

$$\mathrm{O}-\mathrm{H}$$

Question 5

What is the oxidation number of Mn in $$\mathrm{MnO}_2$$?

Accepted Answer

$$+4$$

Question 6

What is the correct name for the compound $$\mathrm{Fe}_2(\mathrm{SO}_4)_3$$?

Accepted Answer

Iron(III) sulfate

Question 7

What type of bond forms between sodium ($$\mathrm{Na}) $$and fluorine ($$\mathrm{F}) in$$ $$\mathrm{NaF}$$?

Accepted Answer

Ionic

Question 8

Which molecule violates the octet rule (excluding hydrogen)?

Accepted Answer

$$\mathrm{BF}_3$$

Question 9

What is the formal charge on nitrogen in $$\mathrm{NH}_4^+$$?

Accepted Answer

$$+1$$

Question 10

What is the molecular geometry of $$\mathrm{SO}_3$$?

Accepted Answer

Trigonal planar

Question 11

Which compound is named dinitrogen tetroxide?

Accepted Answer

$$\mathrm{N}_2\mathrm{O}_4$$

Question 12

Where is the highest electron density found on an electrostatic potential map?

Accepted Answer

Most negative region

Question 13

Which species is reduced in a redox reaction?

Accepted Answer

Gains electrons

Question 14

A patient is given a medication containing $$\mathrm{Fe}_2(\mathrm{SO}_4)_3. $$What is the charge on the iron ion in this compound?

Accepted Answer

$$+3$$

Question 15

Which of the following best explains why $$\mathrm{NaF} is a $$solid at room temperature while $$\mathrm{H}_2\mathrm{O} is a $$liquid?

Accepted Answer

NaF has stronger ionic bonds than the hydrogen bonds in water.

Question 16

Which of the following molecules has a central atom with an expanded octet?

Accepted Answer

$$\mathrm{PCl}_5$$

Question 17

A chemist mixes $$\mathrm{Cl}_2$$ gas with $$\mathrm{NaBr}$$ solution and observes the formation of $$\mathrm{Br}_2$$ and $$\mathrm{NaCl}. $$Which species is oxidized?

Accepted Answer

$$\mathrm{Br}^-$$

Question 18

Which of the following best describes the electron configuration of a chloride ion ($$\mathrm{Cl}^-$$)?

Accepted Answer

$$1s^2$$ $$2s^2$$ $$2p^6$$ $$3s^2$$ $$3p^6$$

Question 19

Which of the following is the correct Lewis structure for $$\mathrm{CO}_2$$?

Accepted Answer

O=C=O, with each O atom having two lone pairs

Question 20

A molecule has a central atom with three bonding pairs and one lone pair. What is its molecular geometry?

Accepted Answer

Trigonal pyramidal

General Chemistry Practice Exam Study Guide

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