1.

An ordinary oxygen contains

Answer»

Only `O - 16` isotopes
Only `O - 17` isotopes
A mixture of `O - 16 and O - 18` isotopes
A mixture of `O - 16, O = 17 and O - 18` isotpes

Solution :An ordinary OXYGEN contains a mixture of `O - 16` (99.8%), `O - 17` (0.0037%), `O - 18 (0.204%)` isotopes


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