Question

An element is soft and can be cut easily with a knife. It is very reactive and cannot be kept open in the air. It reacts vigorously with water.This element is most likely to be
Magnesium
Potassium
phosphorus
Aluminium
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Answer 1

Answer:

It will be potassium because it is quite reactive element and reacts vigorously with water and is soft

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Answer 2

Answer:

Potassium

Explanation:

magnesium , Phosphorus and Aluminium are the element which can't be cutted by a knife as there quite hard in natur.