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Encyclopedia of Chemistry

Period 4 element

A period 4 element is one of the chemical elements in the fourth row (or period) of the periodic table of the elements.

These are:

**Chemical elements in the fourth period**
Group	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18
Atomic number Name	19 K	20 Ca	21 Sc	22 Ti	23 V	24 Cr	25 Mn	26 Fe	27 Co	28 Ni	29 Cu	30 Zn	31 Ga	32 Ge	33 As	34 Se	35 Br	36 Kr
electron configuration all begin with [Ar]	4s¹	4s²	3d¹4s²	3d²4s²	3d³4s²	3d⁵4s¹	3d⁵4s²	3d⁶4s²	3d⁷4s²	3d⁸4s²	3d¹⁰4s¹	3d¹⁰4s²	3d¹⁰4s²4p¹	3d¹⁰4s²4p²	3d¹⁰4s²4p³	3d¹⁰4s²4p⁴	3d¹⁰4s²4p⁵	3d¹⁰4s²4p⁶

This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Period_4_element". A list of authors is available in Wikipedia.

Encyclopedia of Chemistry