What is the equation that represents the mass-energy equivalence discovered by Albert Einstein?

• E=mc

What does the mass-energy equivalence imply about mass and energy?

• They are unrelated.

• They can be converted back and forth.

• Mass is always greater than energy.

• Energy is always greater than mass.

What charge does a proton carry?

• Negative

• Neutral

• Positive

• No charge

What is the charge of a neutron?

• Positive

• Negative

• Neutral

• No charge

What is the atomic number of an element?

• The number of electrons

• The number of protons

• The number of neutrons

• The number of nucleons

What does the mass number of an atom represent?

• The number of protons

• The number of neutrons

• The total number of protons and neutrons

• The number of electrons

If an atom has 6 protons and 6 neutrons, what is its atomic number?

• 12

• 6

• 0

• 18

What element is represented by an atomic number of 6?

• Oxygen

• Carbon

• Nitrogen

• Hydrogen

What term is used to collectively refer to protons and neutrons?

• Electrons

• Nucleons

• Ions

• Quarks

What do we call nuclei with the same atomic number but different mass numbers?

• Isotopes

• Ions

• Molecules

• Compounds