The protons are the characteristic of an element and give the atomic number. The oxygen with eight protons has eight neutrons and eight electrons in its atom.
The electrons, protons, and neutrons have been the constituents of the atom and are particles that are small and make an elemental atom.
The protons and the neutrons together make the atomic mass of the element and are present together in the nucleus. Whereas the electrons have been in the orbitals with a negative charge.
The oxygen atom has an atomic mass of 16 and a number of protons = 8 so,
Atomic mass = protons + neutrons
16 = 8 + neutrons
Number of neutrons = 8
In a neutral element, the number of protons is equivalent to the number of electrons hence the number of electrons = 8
Therefore, in an oxygen atom, the number of protons, electrons, and neutrons is eight.
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