Which of the following is true of a radioisotope undergoing beta emission?
A) Its mass number decreases by four units, and its atomic number decreases by two units.
B) Its mass number decreases by one unit, but the atomic number remains the same.
C) Its mass number remains the same, but its atomic number decreases by one unit.
D) Its mass number remains the same, but its atomic number increases by one unit.
Correct Answer:
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