The number of protons in an atom is known as atomic number. ( which means number of protons equal to number of electrons). It is otherwise known as proton number.It id represented as the letter ' Z ' .
Example:
Atomic number of oxygen, Z = 8
Atomic number of hydrogen, Z = 1
Atomic number of carbon, Z = 6
Example:
Atomic number of oxygen, Z = 8
Atomic number of hydrogen, Z = 1
Atomic number of carbon, Z = 6
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