What are atoms?

• The basic building blocks of all matter
• One of the phases of matter
• They travel in energy
• They are radiated from the sun

Which subatomic particle is inside the nucleus of an atom and has a positive charge?

• Proton
• Electron
• Neutrophil

Which subatomic particle is inside the nucleus of an atom and has a positive charge?

• Proton
• Electron
• Neutrophil

Which subatomic particle is inside the nucleus of an atom and has no charge?

• Proton
• Electron
• Neutron
• Neutrophil

Which subatomic particle travels outside of the nucleus of an atom and has a negative charge?

• Proton
• Neutron
• Electron
• Neutrophil

Does an atom take up space and have mass?

• Yes
• No

How many kinds of atoms are elements composed of?

• 1
• 2
• Hundreds
• Trillions

When two or more atoms are combined chemically, they make what?

• Mixture
• Compound
• Solution
• Vapor

When two or more different substances are physically combined, they form what?

• Compound
• Mixture
• Solution
• Vapor

In a heterogeneous mixtures, particles are easily seen.

• True
• False