Atomic Structure 2

What is the mass number of a nitrogen atom that has 8 neutrons?

• 15

• 14

• 22

• 8

What is the mass number of an atom that contains 9 protons, 10 neutrons, and 9 electrons?

• 9

• 10

• 18

• 19

What is the mass number of an atom that contains 8 protons, 9 neutrons, and 8 electrons?

• 8

• 9

• 16

• 17

What is the mass number of a calcium atom that has 21 neutrons?

• 20

• 21

• 41

• 40

What is the mass number of a beryllium atom that has 3 neutrons?

• 4

• 7

• 9

• 3

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

What is the atomic number of this atom?

• 1
• 3
• 4
• 7

What is the mass number of this atom?

• 1

• 3

• 4

• 7

How many protons are in a sodium atom, Na? (tap to enlarge the periodic table)

• Sodium has 1 proton.

• Sodium has 3 protons.

• Sodium has 11 protons

What is the atomic number of Nickel? (enlarge the periodic table)

• 110

• 28

• 46

• 78