Period 3 element.html

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
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Element categories in the periodic table

Metals						Metalloids	Nonmetals			Unknown
Alkali metals	Alkaline earth metals	Inner transition elements		Transition elements	Other metals		Other nonmetals	Halogens	Noble gases
		Lanthanides	Actinides

Mnemonic

A mnemonic (attributed to Richard Feynman)^{citation needed} for the elements of Period 3 (more precisely, starting from Neon, the last element of Period 2, and ending at Chlorine, the second-to-last element of Period 3) is:

"Nena, m'gal, sips chlorine"

(i.e., Ne-Na Mg-Al Si-P-S Chlorine).

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