Question

An element ‘X’ is soft and can be cut with knife. It is very reactive to air and cannot be kept open in the air. Identify the element from the following:

a. Calcium

b. Sodium

C. Magnesium

d. Aluminium​

Answer 1

Answer:

sodium is the write answer may it help u

Answer 2

Answer:

b) Sodium

explation:

Sodium is the softest metel and can be easily cut with knife

hope my answer helped you