Two elements X and Y belong to group 1 and 2 respectively in the same period of periodic table. Compare these elements with respect to
(i) number of electrons in their outermost orbits (ii) their valencies
(iii) metallic character (iv) their atomic size
(v) formula of their chlorides (vi) formula of their sulphates

Explanation

(i) The element X and Y have 1 and 2 electrons in their valence or outermost orbits.
(ii) The valencies of the element X and Y are 1 and 2 respectively.
(iii) The element X is more metallic than element Y.
(iv) The atomic size of element X is more than that of Y.
(v) The chlorides of the elements are `XCl "and "YCl_(2).`
(vi) The sulphates of the elements are `X_(2)SO_(4)" and "YSO_(4).`