Question

Statements give below are incorrect. Write the correct statements:-
i) The number of neutrons in the nucleus determine the atomic number of en element.
ii) Iron can have variable valency of 2+ and 4+ .
iii) Balancing of a chemical equation is to verify Dalton’s atomic theory. iv) Decantation method is helpful in separation of salt solutions.
v) Most of the elements exist in elementary form in nature.​

Answer 1

Answer:

ii

Explanation:

Answer 2

ii) is the right answer

iron can have variable valency of 2+ and 4+.