In the nucleus of an oxygen-18 atom there are 10 neutrons while in the nucleus of an oxygen-16 atom there are only 8 neutrons. All oxygen atoms have 8 protons but the nucleus might contain 8 9 or 10 neutrons. Oxygen Shells Oxygen Chemistry Projects Binding Energy Oxygen-16 16O is a stable isotope of oxygen having 8 neutrons and 8 protons in its nucleus. . Stable oxygen atoms may contain 8 9 or 10 neutronsby far over 997 the most common is with 8 neutrons next about 02 is 10 neutrons. Oxygen has an atomic number of 8 and the mass number of an atom is the sum of its atomic number plus its neutron number. It has a mass of 1599491461956 u. Oxygen-16 16 O is a stable isotope of oxygen having 8 neutrons and 8 protons in its nucleus. It has a mass of 1599491461956 u. March 24 2022. Light oxygen-16 with 8 protons and 8 neutrons is the most common isotope found in nature followed by much lesser amounts of heavy oxy...
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