What is K? The important knowledge K.

Definition of K
K is the chemical symbol of the element Potassium.
1.1 Names
1.1.1 Common name: Potash
1.1.2 English name: Potassium
1.2 Atomic mass: 39.0983
1.3 Atomic weight: approximately 39.09
1.3.1 Molecular structure: Potassium is an element that does not contain molecules.
1.4 Ion structure: K+ (potassium ion)

Properties of K
2.1 Physical properties of K
State: solid metal
Color: silver white
Odor: odorless
pH level: undefined
2.2 Chemical properties of K: Potassium is highly flammable in the air and reacts easily with water to form hydrogen and potassium hydroxide.

Common chemical equations involving K
Metallic reaction: K + H₂O -> KOH + H₂
Acid reaction: K + HCl -> KCl + H₂
Non-metal reaction: K + Cl₂ -> KCl
Reaction with salt: no reaction

Preparation of K
4.1 Laboratory preparation of K: none, because potassium is highly flammable in the air and reactive with water.
4.2 Industrial preparation of K: burn coal to generate high temperatures, then add potassium chloride. When the temperature is high enough, potassium chloride will decompose into potassium and chlorine. Potassium rises to the top and is recovered.