Question

State reactions
1. Calcium does not occurs in free state in nature.

Answer 1

Answer:

2Ca+O2=2CaO

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Explanation:

Answer 2

Answer:

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.

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.