Period 5 element

A period 5 element is an element in the fifth period (row) of the periodic table. It contains 18 elements, beginning at Rubidium and ending at Xenon.

Period 5 elements have electrons in the first five electron shells. All period 5 elements have one or more electrons in the fifth electron shell (valence electrons). When atomic number increases by one, another electron is added. Two electrons join the 5s orbital, ten electrons join the 4d orbital, and six electrons join the 5p orbitals.

This short article about chemistry can be made longer. You can help Wikipedia by adding to it.

v t e Periodic tables
Layouts	Standard Large table Inline f-block Vertical Text only Metals and nonmetals Blocks Valences Extension beyond the 7th period Large wide table Electron configurations Electronegativities Alternatives Janet table Crystal structure Discovery periods
List of elements by	Name etymology (symbol) Discovery Abundance (in humans) Nuclear stability Atomic properties Production
Data pages	Electron configurations Densities Electron affinities Melting points Boiling points Critical points Heats of fusion Heats of vaporization Heat capacities Vapor pressures Pauling electronegativities Ionization energies Atomic radii Electrical resistivities Thermal conductivities Thermal expansion coefficients Speeds of sound Elastic properties Hardnesses Abundances Oxidation states
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)
Other element categories	Periods Metals Transition metals Metalloids Nonmetals Lanthanides Actinides Superactinides Rare earth elements Platinum group metals (PGMs) Post-transition metals Refractory metals
Blocks	s-block p-block d-block f-block g-block
Periods	1 2 3 4 5 6 7 8 9 10
Category:Periodic table