12. Describe how each of the following are related. a. Group number and number of valence electrons
for representative elements
b. Principal energy level of valence electrons and
period number

What is the relation between concentration of reactants and the rate of chemical reaction?

What type of reaction is shown below? check all that apply. 2h2o2 → 2h2o + o2 synthesis decomposition combustion

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.