Question

iii) Give two examples for each. a)Diatomic element. b)Ions c)Poly atomic element d)Element with variable valency. e)Polyatomic ion with charge -3.​ please help.

Answer 1

Answer:

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Explanation:  a) hydrogen (H2), nitrogen (N2),  b)   c)  carbon dioxide (CO2) and water (H2O).   d) cuprous oxide (Cu2O) and cupric oxide (CuO). e) ammonium, phosphate

Answer 2

Answer:

a) H, N

b)  Al3+ (Aluminium cation), O-2 (Oxide)

c) HNO₃, H₂SO₄

d) Elements such as Mercury has valency 1 and 2 whereas Tin has valency 2 and 4.

e) Ammonium