Definitions

Question 1

Activation energy

Answer 1

minimum amount of energy needed for particles to react.

Question 2

Isotope

Answer 2

• two of the same atoms (same number of protons and electrons)
• but different number of neutrons

Question 3

Ions

Answer 3

• Atoms that have the same number of protons and neutrons
• But different number of electrons

Question 4

Mole

Answer 4

6.02 x 10^23 particles

**Avogadro’s constant **