What is K?

Potassium (K) is a soft
and light alkali metal
of a silver-white colour.
It is not present in nature in its pure state,
but in complex compounds it is present in
almost everything around us: in the soil,
in water, in the cells of all living organisms.
This vital element has no natural or artificial substitutes.

Potassium is one of the ten most
common elements on Earth: its concentration
in the Earth's crust is about 2.4%. Typically, the concentration of potassium is rather low, and it accumulates only in certain minerals
and rock salts, forming rocks.

There are more than ten minerals containing
potassium, but sylvinite and carnallite are
the two with the highest concentration.