GK
NUCLEAR SCIENCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The decrease in the atomic number is not observed in case of
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electron capture
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positron emission
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Explanation:
Detailed explanation-1: -In beta minus emission the particle emits an electron and gets transformed into the nucleus with the atomic number Z+1. This means that the atomic number is increased and not decreased.
Detailed explanation-2: -Hence, decrease in atomic number is observed in alpha emission, positron emission and electron capture, whereas increase in atomic number is seen during emission.
Detailed explanation-3: -As in positron emission, the nuclear positive charge and hence the atomic number decreases by one unit, and the mass number remains the same.
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