Electron Shell Rules: Flashcards
1
Q
What do electrons always occupy?
A
Shells ( sometimes called energy levels)
2
Q
Which energy levels are filled first?
A
The lower energy levels - closest to the nucleus
3
Q
How many electrons are allowed in the first shell?
A
2
4
Q
How many electrons are allowed in the second shell?
A
8
5
Q
How many electrons are allowed in the third shell?
A
8
6
Q
When are atoms much happier?
A
When they have full electron shells - like noble gases
7
Q
In most atoms the outer shell isn’t full. What does this make the atom want to do?
A
React
