When assigning quantum numbers, how many of the same quantum values may two electrons in the same atom share? a.) one b.) two c.) three d.) four

Adeuteron, 21h, is the nucleus of a hydrogen isotope and consists of one proton and one neutron. the plasma of deuterons in a nuclear fusion reactor must be heated to about 3.02×108 k . what is the rms speed of the deuterons? express your answer using two significant figures.