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Based on MO theory or band theory, which of the following metals would you expect to...

Based on MO theory or band theory, which of the following metals would you expect to have the highest melting point? A. iron B. nickel C. chromium D. copper E. calcium

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Answer #1

Ans is c chromium

molecular orbital of iron

Iron        26  [Ar] 4s2 3d6 there is 4 unpaired electron

molecular orbital of nickel

Nickel 28 [Ar] 4s2 3d8 there is 2 unpaired electron

molecular orbital of chromium

chromium 24 [Ar] 4s1 3d5 there is 6 unpaired electron

molecular orbital of copper

Copper 29 [Ar] 4s1 3d10 there is 1 unpaired electron

molecular orbital of calcium

calcium 20 [Ar] 4s2

from the above molecular unpaired electron theory chromium have most unpaired electron

so that from above metal chromium have the highest melting point

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