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An element A is soft and can be cut with...

An element A is soft and can be cut with a knife. This is very reactive to air and cannot be kept open in air. It reacts vigorously with water. Identify the element from the following. 

A

Mg

B

Na

C

S

D

Mg

Text Solution

Verified by Experts

The correct Answer is:
B
Sodium (Na) gives all the characteristics of the element X.
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