Free points mwahahaha

Drug abuse will not lead to physical and psychological dependence. true or false ?

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.

Will mark brainliest how many electrons can be held in the energy level n = 4?