Question

Select the correct one - Element with variable valency -

1)Hydrogen

2)Oxygen

3)Copper

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Answer 1

$\huge\boxed{\underline{\mathcal{\red{A } \green{N } \pink{S } \orange{W } \blue{E } \pink{R }}}}$

3) Copper ✓✓

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Answer 2

Answer:

copper

Explanation:

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