Flashcards in Electron Shells Deck (5):
Electrons always occupy [ ]
Shells (sometimes called energy levels)
Which energy levels are filled with electrons first?
The lowest energy levels
How many electrons can go in the first 3 shells?
When do atoms want to react? and when not?
If an atom has a full outer shell (like noble gases) they are nonreactive
If they don't have a full outer shell they're reactive