How we can Find the atomic mass of oxygen exactly by chemical reaction ?
for ex why is Atomic mass of oxygen is 15.99 g
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The sum of the numbers of protons and neutrons in the nucleus is called the mass number and, expressed in amu, is approximately equal to the mass of the atom. An atom is neutral when it contains equal numbers of electrons and protons.
Oxygen - to find AMU, we will plus the proton and neutron , so proton and neutron are same that is 8
8+8 equals to 16( round of )
Oxygen is the eighth element in the periodic table, with the symbol O. This means that it has eight electrons in its neutral state. Since it is neutral, it also has eight protons!
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