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

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

Protons and Electrons balance the charge of an atom.

• True
• False

Electric charges that are different _______ each other.

• Attract
• Repel

Electric charges that are alike _______ each other.

• Attract
• Repel

What charge does a proton have?

• negative (-)
• positive (+)
• neutral or no charge (0)

What charge does an electron have?

• negative (-)
• positive (+)
• neutral or no charge (0)

If a substance has a higher number of electrons than protons on its surface, what type of charge does it have?

• A positive charge.
• A negative charge.
• A neutral charge
• No charge at all

Which of these is the electron?

• A

• B

• C

The Electric force is most similar to what other fundamental force in the universe?

• Gravitational force

• Strong nuclear force

• Weak nuclear force

• The Force in Star Wars

Go to the PhET model of Coulomb's Law here: (Cut and paste into an url to visit) * Use for problems (6-13)

‪https://phet.colorado.edu/en/simulation/coulombs-law

Choose the "Macro Scale" button. By default, charge 1 (blue) has a value of -4 uC (micro-Coulombs). The negative value indicates that this particle (labeled q1) has a ___________ charge.

• Negative

• Positive

• Neutral