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:
A. magnesium
B. potassium
C. phosphorous
D. aluminium
Answer:B
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:
A. magnesium B. potassium C. phosphorous D. aluminium