Question

state reason calcium does not occur free in nature.

Answer 1

Calcium is a very reactive metal. Hence it reacts with the substances in the surrounding! Metals of high reactivity are never found in free state. They are always combined with impurities.

Answer 2

Answer:

Calcium cannot exist in its natural state since it's highly reactive and readily reacts with the surrounding elements to form Calcium compounds.

Explanation:

Step 1 : Write down the atomic number of Calcium

The atomic number of Calcium is = 20

Step 2 : Write down the electron configuration of Calcium.

The electron configuration is given by :

= 2 : 8 : 8 : 2

Calcium reacts by losing its two valence electrons.

Reactivity of metals increase across the period.

This means that the larger the period the higher the reactivity.

Calcium is in period 4 making it a very reactive metal

For this reason it cannot exist in its natural form but readily reacts with elements in the surrounding to form compounds.