The electron configuration for a 3 cation is 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 4d6. What is this ion

Si una estrella no tiene paralaje medible, ¿qué puedes inferir?

Ais a mountain created from eruptions of lava, ash, rocks, and hot gases.

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.