Atomic Number Examples
An atom’s atomic number is equal to the number of protons in its nucleus or the number of electrons in an electrically neutral atom.
Atomic Number = Number of Protons
For example, the Copper element has 29 electrons and 29 protons in its atom, therefore the Atomic Number of Copper is 29. Similarly, a Sodium atom has 11 electrons and 11 protons, thus its atomic number is 11.
Atomic Number
Atomic number of an element refers to the number of protons present in its nucleus. It’s also called the nuclear charge number and is symbolized by Z. In a nonionized atom, the atomic number equals the number of orbiting electrons.
The atomic number defines the identity of an element. For instance, carbon, with six protons, remains a carbon atom irrespective of how many neutrons it has neutron. The atomic number serves as the unique identifier for each element.
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