HOW DO ATOMS EXIST? Atoms of most elements are not able to exist independently. Atoms form molecules and ions. These molecules or ions aggregate in large numbers to form the matter that we can see,
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MOLECULES OF ELEMENTS AND ATOMICITY The molecules of an element are constituted by the same type of atoms. Molecules of many elements, such as argon (Ar), helium (He), etc. are made up of only one
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MOLECULES OF COMPOUNDS Atoms of different elements join together in definite proportions to form molecules of compounds. Few examples are given in Table. * Refer to Table 
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