Question

Write down 3 examples of elements each having valency 1 and 2.​

Answer 1

Answer:

(i) +1 = Hydrogen, Sodium, Potassium. +2 = Calcium, Magnesium, Zinc.

(ii) -1 = Chlorine, Bromine, Iodine.

Answer 2

Answer:

I do not understand

Explanation:

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