How many valence electrons is each element trying to obtain?

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 can the periodic table be used to predict the behavior of elements?

How many moles of no2 will form when 3.3 moles of cu are reacted with excess hno3?