Question

Why sodium cut by a knife ?

Answer 1

Answer:

There is lot of empty space in the unit cell ,hence metallic bond is weaker. Thus sodium and potassium metals appear soft and can be cut with knife. Why are sodium and potassium called metals even though they can be cut?

Answer 2

Answer:

Explanation:The metallic bond of sodium is weak. There is more empty space .so it can be cut with a knife