Question

why are group 2 metals harder than group 1 metals?

Answer 1

Because of more lattice energy

Answer 2

Hello!

Here is your following answer!
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The reason why group 2 elements are harder than group 1 elment is because:

#Group 2 elements are harder than group 1 elements also known as alkali metals because their outer or valence shell contains only  2 electrons.

 #In the case of group 1 elements the valence shell contains only 1 electron.

#So the bonding of group 2 elements is stronger than group 1 elements.

This proves that they are harder than alkali metals.

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Hope it helps!