The electronic configuration of element Z is 1s² 2s² 2p6 3s² 3p¹. What is the formula of the compound formed between Z and tetraoxosulphate (VI) ion.

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A. Z3(SO4)2
B. ZSO4
C. Z2SO4
D. Z2(SO4)3

Correct Answer:

Option D – Z2(SO4)3

Explanation

Z = 1s² 2s² 2p6 3s² 3p¹

∴
We have Z³+ and SO4²-

The reaction: Z³+ + SO4²- → Z2(SO4)3

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