How can an atom become and ion with a 2+ charge

Which of the following elements would you expect to have the lowest ionization energy value? fluorine, lithium, neon, nitrogen

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 a mixture of salt water be separated into salt and water