Question 1

Which of the following polyatomic ions has a positive charge?

Accepted Answer

Ammonium ($$NH_4$$^+$$)

Question 2

What is the correct electron configuration for the lithium atom?

Accepted Answer

$$1s^2$$ $$2s^1$$

Question 3

Which element forms two or more ions with different ionic charges?

Accepted Answer

Iron ($$Fe)$$

Question 4

Which of the following is a halogen?

Accepted Answer

Chlorine ($$Cl)$$

Question 5

The visible light spectrum covers which wavelength range?

Accepted Answer

$$400 to$$ $$700 nm$$

Question 6

Which polyatomic ion is represented by the formula $$SO_4$$^{2-}$$?

Accepted Answer

Sulfate

Question 7

What is the formula for the nitrate ion?

Accepted Answer

$$NO_3$$^-$$

Question 8

Which compound is correctly named as sodium chloride?

Accepted Answer

$$NaCl$$

Question 9

Which of the following ions is the acetate ion?

Accepted Answer

$$C_2H_3O_2^-$$

Question 10

Which element is in Period 4 and Group 2 of the periodic table?

Accepted Answer

Calcium ($$Ca)$$

Question 11

Which polyatomic ion is represented by $$PO_4$$^{3-}$$?

Accepted Answer

Phosphate

Question 12

Which of the following compounds is correctly named as zinc chloride?

Accepted Answer

$$ZnCl_2$$

Question 13

Which polyatomic ion is represented by $$OH^-$$?

Accepted Answer

Hydroxide

Question 14

Which of the following is a noble gas?

Accepted Answer

Helium ($$He)$$

Question 15

Which of the following ions is the cyanide ion?

Accepted Answer

$$CN^-$$

Question 16

Which of the following elements is an alkali metal?

Accepted Answer

Sodium ($$Na)$$

Question 17

Which polyatomic ion is represented by $$ClO_4$$^-$$?

Accepted Answer

Perchlorate

Question 18

Which of the following best describes the energy of an infrared photon compared to a visible photon?

Accepted Answer

Less than a visible photon

Question 19

Which of the following polyatomic ions is the nitrite ion?

Accepted Answer

$$NO_2$$^-$$

Question 20

Which of the following best describes the speed of electromagnetic radiation?

Accepted Answer

All electromagnetic radiation travels at the same velocity

Introductory Chemistry Exam & Worksheet Study Guide

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