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Question 1

An atom of sodium has an atomic number of 11 and a mass number of 23. Which of the following statements is correct?

a) An atom of sodium has 11 protons, 11 electrons, and 11 neutrons.

b) An atom of sodium has 11 protons, 12 electrons, and 11 neutrons.

c) An atom of sodium has 11 protons, 11 electrons, and 12 neutrons.

d) An atom of sodium has 11 protons, 12 electrons, and 12 neutrons.

Question 2

An atom of phosphorus has an atomic number of 15 and a mass number of 31. How many neutrons does it contain?

a) 15

b) 16

c) 31

Question 3

What is the chemical symbol for magnesium?

a) Ma

b) Mn

c) M

d) Mg

Question 4

Complete the following sentence: 'Different isotopes of the same element have...'

a) ...the same number of protons, but differing numbers of neutrons and electrons

b) ...the same number of neutrons, but differing numbers of protons and electrons

c) ...the same number of protons and neutrons, but differing numbers of electrons

d) ...the same number of protons and electrons, but differing numbers of neutrons

Question 5

Shell three contains how many sub-shells?

a) 1

b) 2

c) 3

d) 4

Question 6

The 3d subshell can hold a maximum of how many electrons?

a) 1

b) 2

c) 6

d) 8

e) 10

Question 7

Calcium has an atomic number of 20. What is its electronic configuration?

a) 1s² 2s² 2p⁶

b) 1s² 2s² 2p⁶ 3s² 3p⁶ 3d²

c) 1s² 2s² 2p⁶ 3s² 3p⁶ 4s²

d) 1s² 2s² 2p⁶ 2d² 3s² 3p⁶

Question 8

Which of the following places the atomic subshells in the correct order of relative energy, starting with the subshell of lowest energy?

a) d, p, s

b) s, d, p

c) s, p, d

d) p, s, d

Question 9

There are how many naturally-occurring isotopes of oxygen?

a) 1

b) 2

c) 3

d) 4

Question 10

The mass of a single atom of a particular isotope is called which of the following?

a) Its atomic number

b) Its atomic weight

c) Its atomic mass

d) Its relative atomic mass

Question 11

The identity of a chemical element is determined by which of the following?

a) The number of protons it possesses

b) The number of neutrons it possesses

c) The number of electrons it possesses

d) The sum of the number of protons and neutrons it possesses

e) The sum of the number of protons and electrons it possesses

Crowe & Bradshaw: Chemistry for the Biosciences 3e

Chapter 2: Multiple choice questions

Instructions

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

Question 7

Question 8

Question 9

Question 10

Question 11