Question

which one of the elements of group 15 forms the largest number of oxides​

Answer 1

Answer:

nitrogen

Explanation:

nitrogen exhibits different oxidation states so it forms largest number of oxides among 15 group elements

Answer 2

Answer:

Nitrogen from group 15 forms the largest number of oxides.

Explanation:

The group 15 elements include

• Nitrogen (N)
• Phosphorous (P)
• Arsenic (As)
• Antimony (Sb)
• Bismuth (Bi)

All the group 15 elements have 5 electrons in their outermost shell. So, they require 3 more electrons to complete their octet. As a result, all the group 15 elements have a -3 oxidation state.

The tendency to produce -3 oxidation state decreases as we move down the group because of the increase in metallic character and atomic size.

1. Nitrogen forms six oxides which are nitrous oxide ($N_2O$), nitrogen monoxide ($NO$), dinitrogen trioxide ($N_2O_3$), nitrogen dioxide ($NO_2$), dinitrogen pentoxide ($N_2O_5$), and dinitrogen tetroxide ($n_2O_4$).
2. Phosphorous forms two oxides which are tetraphosphorous hexoxide ($P_4O_6$) and tetraphosphorous decaoxide ($P_4O_{10}$).
3. Arsenic forms three oxides which are arsenic dioxide ($As_2O_4$), arsenic trioxide ($As_2O_3$), and arsenic pentoxide ($As_2O_5$).
4. Antimony forms five oxides which are diantimony tetroxide ($Sb_2O_4$), antimony trioxide ($Sb_2O_3$), antimony pentoxide ($Sb_2O_5$), and antimony hexitatridecoxide ($Sb_6O_{13}$), and stibiconite ($Sb_3O_6(OH)$).
5. Bismuth forms only one oxide namely bismuth oxide ($Bi_2O_3$).

Therefore, nitrogen forms the largest number of oxides, i.e. 6.

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