Answer: Identifies the number of protons a single atom of the element contains.
Explanation: The atomic number helps people identify elements according to the number of protons one atom of the element has. It essentially defines the element. While having a neutral charge, it also provides the number of electrons the element has (in one atom).
The atomic number tells about the number of electrons and the number of protons present within the atom.
• The atomic number denoted by Z refers to the number of protons within a nucleus.
• In the periodic table, the arrangement of elements is done in order of increasing number of protons, that is, increasing atomic number.
• The number of protons is always equivalent to the number of electrons in orbit around the nucleus of the atom.
Thus, it can be concluded that atomic number tells one regarding the number of protons, as well as, about the number of electrons present within the atom.
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