The decomposition reaction of NOBr(g) to 2 NO(g) and Br2(g) is second order with k = 0.90
1.5-1.
2 NOBr(g) + 2 NO(g) + Br2(g)
What is the half-life of this reaction if the initial concentration of NOBr is 0.78 M?

precipitation

explanation:

when it goes from cloud to rain/back to earth in the form of rain

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.