Chemical Properties of Potassium
The Chemical properties of Potassium are as follows;
- Atomic Number- 19
- Atomic Mass – 39.0983 g.mol -1
- Electronegativity according to Pauling – 0.8
- Density – 0.86 g.cm -3 at 0 °C
- Melting point – 63.2 °C
- Boiling point – 760 °C
- Vanderwaals radius – 0.235 nm
- Ionic radius – 0.133 (+1)
- Isotopes – 5
- Electronic shell -[ Ar ] 4s1
- Ionisation energy- 418.6 kJ.mol -1
- Discovered by Sir Davy in 1808
Potassium Periodic Table Symbol
The name of Potassium is derived from the English word potash. The chemical symbol of potassium is K. The symbol is taken from kalium that is the Mediaeval Latin word for potash, which was initially derived from the Arabic word qali that means alkali. It is a soft, white-silvery metal.
It is a member of the alkali group of the periodic table. It oxidizes instantly in the air and tarnishes within a few minutes that is why it is generally stored under grease or oil. It is light so it can float in water and reacts instantly and releases hydrogen.
Who Discovered Potassium & Where is Potassium Found
Potassium was discovered by Sir Davy in 1808. It is placed at the nineteenth column of the periodic table.
Facts About Potassium
- It is the seventh most abundant element on Earth.
- It was first discovered by Sir Humphry Davy in 1808.
- It is found through electrolysis.
- It makes up 1.5% by mass of the Earth’s crust.
- It is not available as a pure element.
- It can only be found in some minerals and ionic salts.
- Electrolysis of hydroxide and chloride makes the potassium.
- After lithium, it is the second dense metal.
- It can very easily be sliced.
- Argon along with other oils is used to store pure potassium.
- In water, it reacts with the hydrogen and forms heat.
What Are The Uses of Potassium?
The uses of potassium are as follows;
- It has strong properties of the base, therefore, it is used to neutralize acids
- Potassium cyanide can dissolve precious metals like silver and gold.
- It is used for manufacturing daily use items.
- It is used as a medium of heat transfer in many industries.