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Determine the number o moles of ions/atoms/particle in the following: 2.50 miles of k2s (let me know how to do)

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.

What is the atomic number of an atom that has 6 protons