Tabla

Electronic ConfigurationAr 4s1

Melting Point63.8°C

Boiling Point774°C

Density0.856g cm⁻³

Description

Soft silvery metallic element belonging to group 1 of the periodic table (alkali metals). Occurs naturally in seawater and a many minerals. Highly reactive, chemically, it resembles Sodium in its behavior and compounds. Discovered by Sir Humphry Davy in 1807.

Covalent Radius196pm

Double193pm

Ionisation Energies

Oxidation States0, +1

Uses

Used as potash in making glass & soap. Also as saltpeter, Potassium nitrate (KNO₃) to make explosives and to color fireworks in mauve. Formerly called kalium (K). Vital to function of nerve and muscle tissures.

Electron Affinity48.384kJ mol⁻¹

Electronegativity0.82PAULING

Atomic Volume45.3cm³ mol⁻¹

Atomic Radius235pm

Metallic Radius203pm

Van Der Waals Radius275pm

Sources

Found in minerals like carnallite [(KMgCl₃).6H₂O] & sylvite (Potassium chloride, KCL). Pure metal is produced by the reaction of hot Potassium chloride and Sodium vapors in a special retort.

Discovery

Discovered in 1807 by Sir Humphrey Davy in England

Name Origin

English: pot ash; symbol from Latin: kalium, (alkali).

CAS7440-09-7

Crust Abundance2.09x10⁴mg kg⁻¹

Sea Abundance399mg dm⁻³

Enthalpy of Vapourisation 2.33kJ mol⁻¹

Enthalpy of Fusion102.5kJ mol⁻¹

Enthalpy of Formation89kJ mol⁻¹

Specific Heat - 20°C0.753J (g ⋅ K)⁻¹

Thermal Conductivity79W (m ⋅ K)⁻¹

Isotope	Abundance	Half Life
39K	93.26%	-
40K	0.0117%	1.248x10⁹y
41K	6.73%	-

https://reuben.science

https://github.com/reubn/tabla

Using data from mendeleev.

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