please give me answer of this question fast...
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An element X has atomic number as 17 so it is chlorine and element Y has atomic number as 20 so it is calcium..
(a)X belongs to Group 17 and 3rd Period.
Y belongs to Group 2 and 4th Period.
(b)X+Y=XY
So, Cl+Ca=CaCl
thangaakilan112:
CaCl2 is the compound as valency of calcium is 2
Oh yes! Sry for the mistake...
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