Question

(c) Boron
(d) Oxygen
4 Which of the following elements exhibits variable valency?
(a) Sodium
(b) Hydrogen (c) Aluminium
5. Which of the following radicals has a loncu
(d) lodine​

Answer 1

Answer:

Hydrogen

Explanation:

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Answer 2

Answer:

4). They exhibit variable valency. For example, copper, tin, iron and mercury exhibit variable valency.

5) Iodine

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