Decrease in atomic number is observed during which of the following?
A
alpha emission
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B
beta minus emission
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C
positron emission
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D
electron capture
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Solution
The correct options are A alpha emission C positron emission D electron capture Alpha emission : AZX→A−4Z−2Y+α
Positron emission : AZX→AZ−1Y+01e
Electron capture : AZX+0−1e→AZ−1Y
Hence decrease in atomic number is observed in alpha emission, positron emission and electron capture whereas increase in atomic number is seen during β emission.