The current periodic table of the elements is based on atomic number, which corresponds to the number of protons in the nucleus of an atom. This was proposed by Henry Moseley in 1913.
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atomic number
The current periodic table of elements is based on the atomic number, which was proposed by Henry Moseley. The atomic number of an element is the number of protons in the nucleus of an atom. Each element has a unique atomic number, which determines its place in the periodic table. To determine the atomic number of an element, you can look up the element on the periodic table or refer to the number of protons in the nucleus of the atom.
