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Chemistry

What are isotopes? With reference to which fundamental particle do isotopes differ ? Give two uses of isotopes.

Atomic Structure

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Answer

Isotopes are atoms of the same element having same atomic number but different mass number.

For example : ²⁴₁₂Mg and ²⁶₁₂Mg

Isotopes differ in the number of neutrons.

Uses of isotopes

Radioactive isotopes are used in industry to detect the leakage in underground oil pipelines, gas pipelines and water pipelines.
An isotope of Uranium ²³⁵₉₂U is used as a fuel in nuclear reactors.

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Related Questions

$^{24}$ and $^{26}{12}\text{Mg}$ are symbols of two isotopes of magnesium.
(a) Compare the atoms of these isotopes with respect to :
(i) the composition of their nuclei.
(ii) their electronic configurations.
(b) Give the reason why the two isotopes of magnesium have different mass numbers.
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