Metallic character is highest for the element with configuration

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1s22s22p63s23p64s1

1s22s22p63s23p64s23d5

1s22s22p63s23p64s23d104p3

1s22s22p63s23p64s23d104p65s1

answer is D.

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Detailed Solution

Elements with ns1 configuration have maximum metallic characterDown the group metallic character ↑∴ Li < Na < K <Rb < Cs 2s1 3s1 4s1 5s1 6s1

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