First isotope of O Second isotope of O
`{:("Atomic mass", 15.9936,17.0036),("Number of netarons" , 16 - 8 = 8,17 - 8 = 6),("Number of protons" , 16 - 8 = 8,17 - 9 = 8):}` (Mass number - number of neutrons)`{:("Number of electrons" ,8,8),("Mass number", 16,17):}`