In the Uranium Disintegration Series:
A)the Emission of A $\beta$ ^- Particle Increases the Mass Number a by One and ^-

Multiple Choice

In the uranium disintegration series:

A) the emission of a $\beta$ ^- particle increases the mass number A by one and decreases the atomic number Z by one
B) the disintegrating element merely ejects atomic electrons
C) the emission of an $\alpha$ particle decreases the mass number A by four and decreases the atomic number Z by two
D) the nucleus always remains unaffected
E) the series of disintegrations continues until an element having eight outermost orbital electrons is obtained