In the uranium disintegration series:
A. the emission of a β− 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 α particle decreases the mass number A by four and decreases the atomic number Z by two
D. the nucleus always *** unaffected
E. the series of disintegrations continues until an element having eight outermost orbital electrons is obtained
