HELP! Does hydrogen oxygen have large or small difference of ionization energy? What about for electron affinity?

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.

How many moles of oxygen react with 12 moles of aluminum

8. what happens to matter during a chemical reaction