Question

An element X belongs to group 2 and period 3 of the periodic table. The chemical formulae of its nitrate, sulphate and phosphate respectively will be
A. X(NO3)3, X2(SO4)3, X2(PO4)3
B. X3(NO3)2, X2(SO4)2, X2(PO4)3
C. XNO3, XSO4, XPO4
D. X(NO3)2, XSO4, X3(PO4)2

Answer 1

An element X belongs to group 2 and period 3 of the periodic table so it have valency of +2 (due to 2 valence electron) and it will form

X(NO3)2,XSO4,X3(PO4)2.

Correct option is D

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