Science, asked by kanojiyakrishna61, 6 months ago

_________ and _________ elements exhibit variable valency. *

Hydrogen & Lithium
or
Iron & Silicon
or
Copper & Mercury
or
All of the Above

Answers

Answered by jneiljoshi
0

Answer:

so, ans is copper and mercury

Attachments:
Answered by BeautifullMind
2

Answer:

the correct answer is Copper and Mercury

Explanation:

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