9/9: Unit 1 Test Review

Each element has its own unique arrangement of protons

Each element has its own unique arrangement of neutrons

Each element has its own unique arrangement of electrons

1 and 2

1 and 3

2 and 3

1, 2, and 3

release energy

absorb energy

release and then absorb energy

absorb and then release energy

When it moves from an excited state to a ground state

When it moves from a ground state to an excited state

When it moves from lower energy level to a higher energy level