Atomic Theory 1

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

• Protons only

• Neutrons and Electrons

• Protons and Neutrons

• Protons and Electrons

If an atom has 12 positively charged subatomic particles, which of the following must it also have to be considered a neutral atom?

• 12 neutrons

• 12 protons

• 12 electrons

• 24 protons and neutrons

What is the atomic number of the atom pictured?

• 9

• 8

• 18

• 19

Which of the following determines the identity of an element?

• number of protons

• number of neutrons

• atomic mass

• number of shells

A neutron has a charge of

• +2

• +1

• -1

• no charge

How are elements ordered on the Periodic Table?

• Alphabetical Order

• By their atomic mass.

• By their color.

• By their atomic number.

Match the following.

• Nucleus

• Neutron

• Nucleus

• Electron

• Electron Cloud

• Proton