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The atomic weight (not mass) of oxygen is [15,99903; 15,99977] or as a conventional value 15,999.

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What is mass number of oxgen?

Oxygen is a non metal element. Atomic mass of it is 16.


What is Atomic mass units of an atom that contains 8 protons 9 neutrons 8 electrons?

The atomic mass unit of an atom is the sum of the protons and neutrons in its nucleus. In this case, with 8 protons and 9 neutrons, the total atomic mass unit of the atom would be 17. The number of electrons does not significantly affect the atomic mass unit of an atom.


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does carbon atom have the same mass as a oxgen atom?

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