Which of the following is always equal to the number of protons in an atom 1pc of a given element?
Mass number
Olonic number
O Atomic number

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.

If two objects at different te,peraure are in contact with each other what happens to their temperature

How many grams of mgbr2 are needed to produce 75g or metal?