Atomic Structure and the Periodic Table: Electron Energy Levels (DONE)

Question 1

What does the atomic number tell us?

Answer 1

The atomic number tells us the number of protons in the nucleus. It also tells us the number of electrons because the number of protons and electrons are the same in a neutral atom.

Question 2

Electrons exist in..

Answer 2

Electrons exist in energy levels or shells.

Question 3

What does the group number of an element also tell us?

Answer 3

The group number tells us the number of electrons in the outer shell.