Question

two elements X and Y belong to the second group of periodic table. X has 2 shells and Y has 3 shells in it a) which of these is more metallic in nature. why ? b) what is the formula of the chloride of X and sulphide of Y? c) is the valency of X same as that of Y or different? why ?

Answer 1

a) element Y is more metallic as the metallic character increases as when we move down a group in the periodic table.

Also, Electro positivity is directly proportional to metallic character as size of the atom increases, electro positivity increases.

b) chloride of X = XCl2 Sulphide of Y= YSc) X &. Y shall have the same valency.

Because, in a group, all the elements have same number of valency electrons.

Answer 2

Answer:

X is Magnesium and Y is calcium

a) Calcium or element Y is more metallic in nature as metallic properties increase as we go down a group.

b) XCl2 and YS

c) The valency of both X and Y is same as they are in the same group. Only the number of shells are different.