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

An element is soft and can be cut with a knife. It is very reactive and cannot be kept open in the air. It reacts vigorously with water. The element is most likely to be :

A

magnesium

B

potassium

C

phosphorus

D

aluminium.

Text Solution

Verified by Experts

The correct Answer is:
B
Potassium is soft and very reactive element. It reacts vigorously with air and water.
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