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Question
What are isotopes? With reference to which fundamental particle do isotopes differ? Give two uses of isotopes.
Solution
Isotopes: Atoms of the same element having the same atomic number but different mass numbers.
Isotopes differ with reference to neutrons.
Uses of isotopes:
Some isotopes are radioactive, i.e. isotopes of cobalt are used for treating cancer and other diseases.
An isotope of 235U is used as a fuel in a nuclear reactor
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