Correct answer: B). The number of protons
The atomic number of any chemical is same as the total number of protons that is found in the nucleus of an atom. It is similar to the charge of the nucleus. It is depicted by the symbol Z. If the atomic number of any atom is high, it shows that it is higher atom. In an uncharged atom Z is equal to number of electrons.
Hence, the correct answer would be option B.
