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Question

Name the metal that can be easily cut by knife.


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Solution

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(Na) is a metal that can easily be cut by a knife.


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