A period 5 element is one of the chemical elements in the fifth row (or period) of the periodic table of the elements. They all have 5 electron shells.

These are:

Chemical elements in the fifth period

Group	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18
# Name	37 Rb	38 Sr	39 Y	40 Zr	41 Nb	42 Mo	43 Tc	44 Ru	45 Rh	46 Pd	47 Ag	48 Cd	49 In	50 Sn	51 Sb	52 Te	53 I	54 Xe
e--conf.

Colors in the periodic table show element categories

Metals					Metalloids	Nonmetals
Alkali metals	Alkaline earth metals	Inner transition elements	Transition elements	Other metals		Other nonmetals	Halogens	Noble gases
		Lanthanoids
		Actinoids		(Unknown type)

v • d • e Periodic tables Layouts Standard · Inline f-block · Vertical · Full names · Names and atomic weights · Text for last · Large table · Metals and nonmetals · Blocks · Valences · Extension beyond the 7th period · 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 (Alkali metals) · 2 (Alkaline earth metals) · 3 · 4 · 5 · 6 · 7 · 8 · 9 · 10 · 11 · 12 · 13 (Boron group) · 14 (Carbon group) · 15 (Pnictogens) · 16 (Chalcogens) · 17 (Halogens) · 18 (Noble gases) Periods 1 · 2 · 3 · 4 · 5 · 6 · 7 · 8 Other element categories Metals · Transition metals (1st row) · Metalloids · Nonmetals · Lanthanoids · Actinoids · Rare earth elements · Platinum group metals (PGMs) · Post-transition metals Blocks s-block · p-block · d-block · f-block