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CBSE Notes 2011-2012

An element A is soft and can be cut with a knife. This is very reactive to air and cannot be kept op...

Multiple choice question

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

unknown

Mg

unknown

Na

unknown

p

unknown

Ca