The electrons in the atoms of two elements X and Y are distributed in three shells

The electrons in the atoms of two elements X and Y are distributed in three shells having 1 and 7 electrons respectively in their outermost shells.

1. Write the group numbers of these elements in the Modern Periodic Table.
2. Write the molecular formula of the compound formed when X and Y combine with each other.
3. Which of the two is electropositive ?

Answer

(a) X - 1; Y - 2

(b) XY

(c) X