Question

an element X atomic number 11 react with an element Y atomic number 17 to formed mono wheel and Ally first identify the position of X and Y in group and period in the periodic table

Answer 1

position of X=group1 and 3rd period
position if Y= group 17 and 3rd period
group no= no of valence electrons
( if valence electrons is> 4 then group no is valence electrons +10
ex: valence electrons=7
group no= 7+10=17)
period =no of shells