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.

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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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.

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).

v - d - e Periodic tables Layouts Standard · Vertical · Full names · Names and atomic weights · Text for last · Large table · Metals and nonmetals · Blocks · Valences · Inline f-block · 218 elements · Electron configurations · Atomic weights · Electronegativities · Alternatives · Crystal structure Lists of elements by Name · Atomic symbol · Atomic number · Atomic weight · Name etymology (after places, after people) · Discovery Boiling point · Melting point · Density · Oxidation state · Abundance (in humans) · Nuclear stability · Hardness Groups 1 (Alkalis) · 2 (Alkaline earths) · 3 · 4 · 5 · 6 · 7 · 8 · 9 · 10 · 11 · 12 · 13 · 14 · 15 (Pnictogens) · 16 (Chalcogens) · 17 (Halogens) · 18 (Noble gases) Periods: 1 · 2 · 3 · 4 · 5 · 6 · 7 · 8 Other element categories Metals · Transition metals · Metalloids · Nonmetals · Lanthanoids · Actinoids · Rare earths · Platinum group · Post-transition metals Blocks s-block · p-block · d-block · f-block · g-block