1.

The hardness Cr is due to ….And metallic lusture is due to

Answer»

Covalent BOND, METALLIC bond
Covalent bond, hydrogen bond
Metallic bond, covalent bond
Metallic bond, hydrogen bond

Solution :Covalent bond is CONSTITUTED by electrons of d-orbitals and luster is due to FREE electrons of s-orbital in metallic bond.


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