Question

name the element water is made of. what are the valencies of there elements? work out the chemical formula for water.

Answer 1

water is made of hydrogen and oxygen

hydrogen has the valency 1 and oxygen has the valency 2

formupa of water is H2O

Answer 2

hey friend

water is made of hydrogen and oxygen.
valency of hydrogen is 1
valency of oxygen is 2
the compound is H2O

2H2 + O2 = 2H2O

hope u like my answer :)