The atomic number is the number of protons in the nucleus of an atom, according to M.J. Farabee, author of Chemistry 1: Atoms and Molecules. The number of protons define the identity of an element, and it determines how ... More »

An atomic number represents the amount of protons that an element consists of in its nucleus. It is the identifying number that is unique to one atom of the specific element. More »

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The atomic number indicates the number of protons present in the nucleus of an atom, which is used to uniquely identify the atom, as well as its chemical properties. The atomic number is denoted by the universal symbol "... More »

The atomic number indicates the number of protons present in the nucleus of an atom, which is used to uniquely identify the atom, as well as its chemical properties. The atomic number is denoted by the universal symbol "... More »

The atomic number represents the number of protons present in the nucleus of an atom. The atomic number of an element is located on the upper-left corner of that element in the periodic table. More »

An atomic number assigned to an atom changes when the number of protons in the nucleus of the atom changes. By definition, the atomic number of an atom is the number of protons in the nucleus of the atom. More »

The number of protons in the nucleus of an atom determines its atomic number. Each element on the periodic table has a different number of protons in its nucleus and its own atomic number. More »