Period 3 element

Period 3 element
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "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:

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**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., NeNa, MgAl, SiPS Chlorine).

v • d • e Periodic tables

Layouts	Standard · Vertical · Full names · Names and atomic masses · Text for last · Huge table · Metals and nonmetals · Blocks · Valences · Inline f-block · 218 elements · Electron configurations · Atomic masses · Electronegativities · Alternatives

Lists of elements	Name · Atomic symbol · Atomic number · Boiling point · Melting point · Density · Atomic mass

Groups	1 · 2 · 3 · 4 · 5 · 6 · 7 · 8 · 9 · 10 · 11 · 12 · 13 · 14 · 15 · 16 · 17 · 18

Periods:	1 · 2 · 3 · 4 · 5 · 6 · 7 · 8

Element categories	Alkalis · Alkaline earths · Lanthanides · Actinides · Transition metals · Metals · Metalloids · Nonmetals · Halogens · Noble gases

Blocks	s-block · p-block · d-block · f-block · g-block

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