Atoms

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

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

What subatomic particle is electrically neutral (no charge)?

• Proton
• Ion
• Neutron
• Electron

Protons and Electrons balance the charge of an atom.

• True
• False

Which subatomic particles contribute the most to the mass of an atom?

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

What is the mass of an atom if it has 11 protons, 12 neutrons, and 11 electrons?

• 22
• 11
• 34
• 23

The smallest particle of any type of matter is known by which of the following terms?

• Element
• Compound
• Atom
• Chemical

What subatomic particle is positively charged and is located inside of the nucleus?

• Proton
• Neutron
• Electron
• Ion

Which one of these is NOT located in the element square on the Periodic Table?

• Atomic Number
• Atomic Mass
• Room Temperature
• Chemical Symbol

Where are electrons of an atom found?

• Nucleus
• Electron Cloud
• Some are in the nucleus and some in the electron cloud.
• They are moving everywhere.

What is the atomic number for an element with three protons?

• 2
• 1
• 3
• 6