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Atomic number
01
the order of an element in Mendeleyev's table of the elements; equal to the number of protons in the nucleus or electrons in the neutral state of an atom of an element
Example
Atomic number indicates the number of protons in an atom's nucleus, determining its chemical identity.
Helium is a noble gas chemical element with the atomic number 2.
The periodic table organizes elements based on their atomic number and properties.
The periodic table organizes elements based on their atomic numbers and properties.
Elements in the periodic table are organized by increasing atomic number, reflecting the number of protons in an atom's nucleus.
