Find the rate law for the following reaction when the concentration is .6m and the reaction rate is 4m/s.

i believe you are right for all except the 3rd ( look at sqdancefan his answer is much better)

periodic trends is an atom that gets larger as the number of electronic shells increase, the radius of atoms increases as you go down a certain group in the periodic table of elements. in general, the size of an atom will decrease as you move from left to right of a certain period.