Question

Name the metal that can be easily cut by knife.

Answer 1

Sodium can be cut by knife:

• Metals can be cut with a knife easily because:
• Sodium belongs to alkali group metal(first group of the periodic table) and it can easily be cut with a knife.
• As the atomic size increases down the group, the force of attraction between the valance electron and nucleus decreases.
• Metallic bonds are not strong.
• Sodium is very soft.
• The cohesive forces between metal atoms are weak and responsible for the soft texture.

Therefore, Sodium($\mathrm{Na}$) is a metal that can easily be cut by a knife.