C05 Atomic & Mass Number

What is the atomic number?

• the number of protons
• the number of protons and neutrons
• the number of neutrons
• the number of protons and electrons
• the number of electrons and neutrons

Match the following

• 8 p⁺

  10 n

• Oxygen-21

• 8 p⁺

  8 n

• Oxygen-17

• 8 p⁺

  13 n

• Oxygen-18

• 8 p⁺

  12 n

• Oxygen-16

• 8 p⁺

  9 n

• Oxygen-20

What is the atomic number of this nucleus?

• 1
• 3
• 4
• 7

What is the mass number?

• 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?

• 4
• 5
• 9
• none of the above

What is the atomic number of this atom?

• 9
• 10
• 19
• 27

What is the atomic number of this atom?

• 2
• 4
• 6
• none of the above

What is the atomic number of this atom?

• 1
• 2
• 3
• 4

What is the atomic number of this atom?

• 7
• 14
• 21
• none of the above

What is the atomic number of this atom?

• 8
• 16
• 24
• none of the above