Question

# What is the chemical formula of Potassium?A. KB. NaC. CaD. Cu

Hint: Potassium is an element which is having atomic number 19, represented by the symbol K. It belongs to the S-Block in periodic table. It is found extensively as potash(KOH).

- Potassium has a silvery-white colour; it is basically a metal that is very soft which can be easily cut with the help of a knife.

- Potassium belongs to alkali metals, which have a single valence electron in the outer electron shell, that can be easily removed to create an ion with a positive charge – a cation that combines with anions and forms salts. It is found that potassium occurs only in ionic salts in nature.

- The chemical formula of potassium is K.

- Potassium metal reacts rapidly with atmospheric oxygen, and forms white potassium peroxide . Its name was derived from potash, which means the ashes of plants.

There are several properties of potassium like:
- It is also found that Potassium reacts with water, oxygen and carbon dioxide that are present in air. When it is reacted with oxygen, it forms potassium peroxide. . When reacted with water forms potassium hydroxide, this reaction can be violently exothermic, as there is hydrogen gas which is co produced, can ignite.
-It is having a low melting point, and is also second least dense metal after lithium
-There are several uses of potassium found, some of them are:
-They are used as fertilizer in agriculture.
- Potassium is found to treat and prevent low blood potassium that may occur due to vomiting, diarrhea,etc. It is given by mouth.
-there are several potassium chemicals like potassium chloride, potassium hydroxide, potassium sulphate and potassium carbonate,
- As we know that potassium reacts with water vapour in the air, it is usually stored under anhydrous mineral oil or kerosene.

Hence, we can say that the correct option is (A) that is the chemical formula of potassium is K.

Note:

- The most important property of potassium is:
- It has a low boiling point, and is a very good conductor of electricity and heat.
- It’s vapour is green and also imparts a lavender colour to the flame.