Question

_____ has a varible valency of +2 and +4.

Answer 1

Explanation:

Hg (Mercury)

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Answer 2

Answer:

Tin (Sn)

Explanation:

Tin has a variable valency of +2 and +4

Tin(Sn) → Stannous (Sn²+)

→ Stannic ( Sn⁴+)

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