Question

why H2O contain single atoms of oxygen but al2O3 contains three atoms of oxygen​

Answer 1

Answer:

H20 contains single atom of oxygen because it is the formula of water. Water molecules have 2 hydrogen atoms and one oxygen atom. In al1O3 there are three atoms of oxygen because after O, the number three is written.

Answer 2

H2O CONTAINS SINGLE ATOM OF OXYGEN BECAUSE=>

AS THE FORMULA OF WATE IS H2O WHICH MEANS THAT THERE ARE 2 ATOMS OF HYDROGEN BECAUSE IT IS WRITTEN 2 INFRONT OF H BUT INFRONT OF OXYGEN NOTHING IS WRITTEN SO IT MEANS THAT THERE IS ONLY ONE ATOM, IT MEANS THAT 2 ATOMS OF HYDROGEN AND 1 ATOM OF OXYGEN COMBINE TOGETHER TO MAKE WATER,

BUT IN al2O3, 3 IS WRITTEN INFRONT OF OXYGEN WHICH MEANS THAT WHEN 2 ATOMS OF Al and 3 ATOMS OXYGEN MAKE THE ALUMINIUM OXIDE...

HOPE YOU UNDERSTOOD...