PERIOD 3 ELEMENT

A 'period 3 element' is one of the chemical elements in the third row (or ''period'') of the periodic table of the elements.
These are:

'Chemical elements in the third period'

Group	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18
# Name	11 Na	12 Mg											13 Al	14 Si	15 P	16 S	17 Cl	18 Ar
e--conf.