Directions : In the following question more than one of the answers given may be correct. Select the correct answer and mark it according to the code:
Decrease in atomic number is observed during: (1) \[\alpha -\]emission (2) positron emission (3) electron capture (4)\[\beta -\]emissionA) 1, 2 and 3 are correct
B) 1 and 2 are correct
C) 2 and 4 are correct
D) 1 and 3 are correct
Correct Answer: A
Solution :
Decrease in atomic number is observed during\[\alpha \]-emission, positron emission and electron capture. Electron capture is addition of \[-{{i}^{{{e}^{0}}}}\]hence atomic number decrease by one unit while during \[\beta \]-emission the atomic number is increased by one unit.
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