Question

Which of the following set belong to the same periods?
a] Li, Na, K
b] Li, Mg, Ca
c) Ni, Cu, Zn
d] F,CI,Br
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Answer 1

Answer:

c) Ni, Cu, Zn is the answer.

Explanation:

Hope it help.

Answer 2

Answer:

option C is the answer ( Ni,Cu,Zn )