Number of protons are taken. They are arranged by number of protons. Mendeleev arranged elements first according to atomic number
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Protons contribute to the atomic number of an atom. The atomic number represents the number of protons in the nucleus of an atom.
Protons are equal to the atomic number of an element.
The subatomic particle related to the atomic number of an element is the proton. The atomic number of an element is equal to the number of protons in the nucleus of an atom of that element.
The number of protons equals the number of electrons.
The number of Protons in the nucleus determines the atom's Atomic number.
The atomic number decreases by one for each beta particle