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Which element in Group 15 has the strongest metallic character?

$(a)\;\text{Bi} \\(b)\;\text{As} \\(c)\;\text{P} \\ (d)\;\text{N}$
Can you answer this question?

From left to right across the period, metallic character decreases.
But it increases going down a group (last element in a group will have the most metallic character).
$Bi$ is the last element in group 15 so it is the most metallic.
Hence a is the correct answer.
answered Mar 15, 2014 by