Electric charge

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

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

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

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

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

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

SI unit for electric charge

• Newton

• Coulomb

• Kilogram

• Watts

What subatomic particles can you find at the center of nucleus?

• electron and proton

• proton only

• neutron and proton

• neutron and electron

What is the fundamental value of  electron?

•  e=1.60×10−19 C

• e= 1.60×10−91 C

• e= 1.60×10−15 C

• e= 1.60×10−21 C