Two elements x and y belong to group 1 and 2 respectively in same period. Compare them with A. Number of valence electrons
B.Valency
C. Metallic character
D. Size of the atoms
E. Formula of their oxides and chlorides
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no of valence electrons:x=1 ;y=2
valency:x=1;y=2
metallic character:x more than y
size of atom: x is larger than y in resp. period
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