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What happens to the mass number and atom...

What happens to the mass number and atomic number of an element when it emits y- radiation

A

mass number decreases by four and atomic number decreases by two

B

mass number and atomic number remain unchanged

C

mass numberremains unchanged while atomic number decreases by one

D

mass number increases by four and atomic number increases by two

Text Solution

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The correct Answer is:
B
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