Why transition metals are hard and have high melting points?
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The melting-points of the transition metalsare high due to the 3d electrons being available for metallic bonding. The densities of the transition metals are highfor the same reason as the high boiling points. ... These properties are the result of metallic bonding between the atoms in the metal lattice.
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8
Due to this they are hard. Whereas nontransition metals the electrons are tightly hold by the nucleus, and they are not available for the bonding. So they are soft. Due to strong metallic bonding they are tightly packed as aresult the transition metal has high melting and boiling points.
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