19 K Potassium 39.098 u

Potassium

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Period
4
Group
1
Block
s-block
Phase (STP)
Solid

Potassium is an essential alkali metal for all living cells. It is the seventh most abundant element in Earth's crust.

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Physical Properties

Atomic Mass 39.098 u
Density 0.862 g/cm³
Melting Point 63.6 °C
Boiling Point 758.9 °C
Phase at STP Solid
Atomic Radius 243.0 pm

Electronic Properties

Electronegativity 0.82
Ionization Energy 418.8 eV
Electron Affinity 48.4 eV
Valence Electrons 1

Electron Configuration

Configuration [Ar] 4s¹

Electron Shell Configuration

Potassium electron shell configuration K 2e⁻ 8e⁻ 8e⁻ 1e⁻

Position in Periodic Table

Potassium position in the periodic table K

Discovery

Discovered by: Humphry Davy
Year: 1807

Compounds Containing Potassium

More Alkali Metal

Frequently Asked Questions

What is Potassium?
Potassium (K) is a chemical element with atomic number 19. It is a solid at standard temperature and pressure, classified as a alkali metal.
What are the key properties of Potassium?
Potassium has an atomic mass of 39.098 u, density of 0.862 g/cm³, melting point of 63.6°C, boiling point of 758.9°C.
What is the electron configuration of Potassium?
The electron configuration of Potassium is [Ar] 4s1. It is in the s-block of the periodic table.
Who discovered Potassium?
Potassium was discovered by Humphry Davy in 1807.
What is the electronegativity of Potassium?
Potassium has an electronegativity of 0.82 on the Pauling scale.