The answer is no. 4. Bismuth (Bi)
Across the period, from left to right, metallic character
decreases, meaning, when it is going down, the last element in a group will
have the most metallic character. Since Bismuth (bi) is the last element, it is
the most metallic.
The arrangement of the group 15 elements in ascending rate
of metallic character is: N (Nitrogen) P (Phosphorus), As (Arsenic), Sb
(Antimony) and Bi (Bismuth). Bismuth has the lowest rate of electronegativity
and ionization energy thus, it is more likely to lose an e- than the rest of
the elements of the said group, which is why it is considered the most metallic.
