1.

A nuclide has mass number (A) and atomic number (Z). During a radioactive process if: (A) both A and Z decrease, the process is called alpha-decay (B)A remains unchanged and Z decreases by one, the process is called beta^(+) or positron decay of K-electron capture (C ) both A and Z remain unchanged the process is called gamma-decay (D)both A and Z increase, the process is called nuclear isomerism. The correct answer is:

Answer»

1,2 and 3
2,3, and 4
1,3, and 4
1,2, and 4

Answer :a


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