Modeling Atoms

Match the following subatomic particles with their charges: 1) Proton 2) Neutron 3) Electron.

• C

• Positive charge

• B

• Negative charge

• A

• No charge

An (a)   is the smallest particle of an element that retains its identity in a chemical reaction.

• Atom
• Molecule

• Proton

• Neutron

What are the subatomic particles with no charge called?

Protons are (a)   charged subatomic particles.

• Positively

• Negatively

• Neutrally

What is the dense central core of an atom made of?

What is the symbol for an electron?

• A) e⁺

• B) e⁻

• C) n⁰

• D) p⁺

Fill in the blank: The nucleus is made of (a)   and neutrons.

• Electrons

• Protons

• Quarks

• Photons