Question

How can we make placards with symbols and valencies of the elements seperately

Answer 1

$\huge\underline\mathfrak\orange{Answer}$

Make placards with symbols and valencies of the atoms of the elements separately. Each student should hold two placards, one with the symbol in the right hand and the other with the valency in the left hand. Keeping the symbols in place, students should Criss - cross their valencies to form the formula of a compound.