The melting points of the group 6 elements increase in the order Cr (2180 °C) < Mo (2896 °C) < W (36 — Descriptive Chemistry Chemistry Question
Question
The melting points of the group 6 elements increase in the order Cr (2180 °C) < Mo (2896 °C) < W (3695 °C). Which is the best explanation for this trend?
A.
The degree of covalency increases down the group.
B.✓ Correct
The partial positive charge on the metal atoms in the lattice increases down the group.
C.
The valence orbitals become increasingly contracted down the group due to relativistic effects.
D.
The packing density of the metals increases down the group as the lattice changes from simple cubic to body-centered cubic to face-centered cubic.
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