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Question

(i) Represent the change in the nucleus of a radioactive element when β particle is emitted.
(ii) What is the name given to elements with same mass number and different atomic number?
(iii) Under which conditions does the nucleus of an atom tend to be radioactive?

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Solution

(i) AZXAz+1Y+01β
(ii) Isobars are the elements with same mass number and different atomic number.
(iii) Isotopes of all elements of atomic number higher than 82 and elements having number of neutrons exceeding the number of protons in their nuclei are tend to be radioactive.

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