Which of the following are molecules of compounds?
I) Carbon dioxide
II) Chlorine
III) Hydrogen chloride
Carbon dioxide (CO2)
It has one carbon atom and two oxygen atoms.
Since it is made up of different kinds of atoms, it is a molecule of compound.
Chlorine (Cl2)
It has two chlorine atoms.
Since it is made up of the same kind of atoms, it is a molecule of element.
Hydrogen chloride (HCl)
It has one hydrogen atom and one chlorine atom.