Atomic Mass and Mass Number

Multiple Choice

What is the mass number defined as?

• the number of protons

• the number of protons and neutrons

• the number of neutrons

• the number of protons and electrons

Multiple Choice

What is the mass number of this atom?

• 1

• 3

• 4

• 7

Multiple Choice

What is the atomic number of this atom?

• 1

• 3

• 4

• 7

Multiple Choice

If an atom has 10 electrons, how many protons does it have?

• 0

• 1

• 10

• 5

Multiple Choice

What is the number of protons that the element in this image contain?

• 14

• 7

• 15

• 18