What are the 3 sub-atomic particles called?

• potions, neutrons and electrons
• protons, neurons and electrons
• protons, neutrons and elections
• protons, neutrons and electrons

What is the mass number?

• Number of protons plus neutrons
• Number of protons plus electrons
• Number of neutrons plus electrons

What is the atomic number?

• Number of protons plus electrons
• Number of protons
• Number of protons plus neutrons
• Number of protons, neutrons and electrons

What is the charge on a proton?

• positive 1
• 0
• negative 1

What is the charge on a neutron?

• positive 1
• 0
• negative 1

What is the charge on an electron?

• positive 1
• 0
• negative 1

How many protons, neutrons and electrons does a lithium atom have?

• p=3 n=4 e=3
• p=3 n=7 e=3
• p=3 n=4 e=4

Where are the protons and neutrons found?

• In isotopes
• In ions
• In the nucleus
• In shells

Where are the electrons found?

• In isotopes
• In ions
• In the nucleus
• In shells

How mant electrons fill each shell?

• 2, 4, 6....
• 2, 4, 8....
• 8, 8, 8....
• 2, 8, 8....