Table of Common Isotopes

Table 1. The naturally occurring Isotopes of the first 10 elements of the periodic table.

Table with 4 columns titled Element, Symbol, Number of Protons and Number of Neutrons. For hydrogen, first isotope is deuterium, symbol is H with superscript 2, subscript 1. Isotope has 1 proton and 1 neutron. Second isotope of hydrogen is tritium, symbol is H with superscript 3, subscript 1. Isotope has 1 proton and 2 neutrons. First helium isotope has H E symbol with superscript 3, subscript 2

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Isotopes