State two examples in each case and write their chemical formulae: (a) Molecules having (one kind of atoms only). (b) Molecules having two different kinds of atoms. (c) Molecules having three different kinds of atoms.
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Two examples of One molecule having only one kind of atoms only: O2 (Contains only oxygen) , H2(contains only hydrogen)
Two examples of One molecule having only two kinds of atoms only: HCl (Contains hydrogen and chlorine), KI (contains potassium and iodine)
Two examples of One molecule having only three kinds of atoms only: CFC (Chlorofluorocarbon- CCl3F) (contains carbon , chlorine and fluorine), HClO3 (contains hydrogen, chlrine and oxygen)
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