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Srinivas Rao Grade:
        zinc cadmium and mercury are volatile metals. But, only mercury is a liquid at room temperature and the other two are solids. M.P.s increase down the groups. so, zinc should have been liquid and not mercury.Justify the observed Melting points.
6 years ago

Answers : (1)

SAGAR SINGH - IIT DELHI
879 Points
										

Dear srinivas,


Zinc has relatively low melting point.Cadmium is more volatile than zinc and it is a fairly soft, white metal. It also has lower melting points and boiling points than those of zinc.Mercury is a liquid at room temperature because the "relativistic contraction" of its atomic orbitals makes it behave chemically almost like a noble gas, not wanting to share electrons with other atoms, even other mercury atoms.Mercury is the only metal that remains liquid at room temperature and is nicknamed quicksilver.



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Sagar Singh


B.Tech IIT Delhi


6 years ago
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