Question

Explain with using proper activity/experiment that metals are hard and strength are different in different metals.​

Answer 1

Question:-

How will you show experimentally that metals are good conductors of heat?

Answer:-

Metals are a good conductor of heat.

This can be experimentally proved by the following activity:

Take a glass rod, a silver spoon and a plastic scale. Dip all three in a beaker containing boiling water. Leave the setup for 2-3 mins and touch each of the three, the glass rod, the silver spoon and the plastic scale. You would feel that only the silver spoon is hot.

Thus, it is proved that metals(in this case silver) are good conductors of heat.

Answer 2

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 There are some metals hard which indicates the presence of covalent bonds. . Higher the number of unpaired electrons present in the transition metals, more is the number of covalent bonds formed by them. This further increases the hardness of the metal and its strength.