The
Periodic Table: Patterns & Trends
Slide 10 of 12
Period
Similarly,
the period an element belongs to represents the number of shells
the atom of the element contains.
2, 1
2, 8, 1
2, 8, 8, 1
2,1
2,2 2,3
2,4
2,5
2,6
2,7
2,8
2, 3
2, 8, 3
2, 8, 8, 3
Period/Number of shells
2
3
4
5