Question 1

Which of the following best describes the relationship between wavelength ($\lambda$), frequency ($
u$), and the speed of light ($c$)?

Accepted Answer

$c = \lambda 
u$

Question 2

An element has the electron configuration $1s^2\ 2s^2\ 2p^6\ 3s^2\ 3p^5$. Which element is this?

Accepted Answer

Chlorine (Cl)

Question 3

Which of the following ions has a charge of $+2$?

Accepted Answer

Mg$^{2+}$

Question 4

What is the correct formula for iron(III) oxide?

Accepted Answer

Fe$_2$O$_3$

Question 5

Which of the following is the correct name for the compound Na$_2$SO$_4$?

Accepted Answer

Sodium sulfate

Question 6

Given the reaction: $2H_2 + O_2 \rightarrow 2H_2O$, what type of reaction is this?

Accepted Answer

Combination (synthesis)

Question 7

Balance the following equation: $C_3H_8 + O_2 \rightarrow CO_2 + H_2O$

Accepted Answer

$C_3H_8 + 5O_2 \rightarrow 3CO_2 + 4H_2O$

Question 8

What is the correct name for the compound Cu(NO$_3$)$_2$?

Accepted Answer

Copper(II) nitrate

Question 9

Which of the following is a polyatomic ion?

Accepted Answer

SO$_4^{2-}$

Question 10

What is the correct formula for ammonium phosphate?

Accepted Answer

(NH$_4$)$_3$PO$_4$

Question 11

Which of the following is the correct electron configuration for a neutral sodium atom?

Accepted Answer

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

Question 12

Which of the following compounds is named using Roman numerals?

Accepted Answer

FeCl$_3$

Question 13

What is the correct name for the compound P$_2$O$_5$?

Accepted Answer

Diphosphorus pentoxide

Question 14

Which of the following is the correct formula for calcium nitrate?

Accepted Answer

Ca(NO$_3$)$_2$

Question 15

Which of the following is a decomposition reaction?

Accepted Answer

$2H_2O \rightarrow 2H_2 + O_2$

Question 16

What is the correct name for the compound N$_2$O$_4$?

Accepted Answer

Dinitrogen tetroxide

Question 17

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

Accepted Answer

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

Question 18

Which of the following is the correct name for the compound CO?

Accepted Answer

Carbon monoxide

Question 19

Which of the following is the correct formula for potassium permanganate?

Accepted Answer

KMnO$_4$

Question 20

Balance the following equation: $Al + O_2 \rightarrow Al_2O_3$

Accepted Answer

$4Al + 3O_2 \rightarrow 2Al_2O_3$

Introduction to Chemistry: Atomic Structure, Electron Configuration, Chemical Nomenclature, and Reactions

Study Guide - Practice Questions