Concentration of Species in the Atmosphere 50 OXYGEN and HYDROGEN SPECIES (March 15-Local Noon-40 N) OH H*108 40 202 O(P) (u)opmnIy 30 03 HO2 O(D)*108 CH4 1018 20 10° 109 1010 1012 1014 Number Density (molecules/cm3) Water and Ozone are highest,by far Others are small,but they don't have 8 electrons! VI-10Concentration of Species in the Atmosphere Water and Ozone are highest, by far Others are small, but they don’t have 8 electrons! VII-10