02b - Atomic Number and Atomic Mass

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 mass of this atom?

• 1

• 3

• 4

• 7

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What is the atomic number?

• the number of protons

• the number of protons and neutrons combined

• the number of neutrons

• the number of protons and electrons combined

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

• 110
• 28
• 46
• 78

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

• Sodium has 1 proton.
• Sodium has 3 protons.
• Sodium has 11 protons

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

• 20
• 38
• 56
• 88

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An element has the mass number 12 and atomic number  6. The number of neutrons in it is:

• 6
• 10
• 4
• 8

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

• 0
• 1
• 10
• 5

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How many electrons are in an atom with an atomic number of 50?

• 5
• 8
• 50
• 2

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What subatomic particles would you find in the nucleus of an atom?

• Protons only
• Protons and Neutrons
• Neutrons and Electrons
• Protons and Electrons 

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