I need to know the atoms with one lone pair , two lone pairs, and three lone pairs

Stage in which a star’s outer layers have started to cool and grow outward?

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.

Which are forms of frozen water? check all that apply. dew frost hail rain sleet