Chemistry, asked by ananyakapiljadhav200, 4 months ago

One of the following pair of metals show variable valencies *

1 point

Ca , Mg

Ni , Cr

Ba , Zn

Sn , Hg

Answers

Answered by fatimasahar821

0

Ca ,Mg

Explanation:

because 1 period second group

Answered by madihajaveedmadiha

1

Answer:

Nickel and copper

ie,

Ni ,Cu.

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