Isotopes of an element exhibit similar chemical properties due to their identical electronic configurations, but they may have different physical properties, such as density or stability, due to their differing masses.
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Isotopes of the same element differ in their mass numbers due to variations in the number of neutrons while maintaining the same atomic number.
Chlorine has isotopes with mass numbers 35 and 37, but both have the same atomic number (17). This illustrates isotopes, where the number of neutrons differs but the number of protons remains constant.
Hydrogen has three isotopes: protium (1/1 H), deuterium (2/1 H or D), and tritium (3/1 H or T).
Isotopes are atoms of the same element with the same atomic number but different mass numbers. For example, carbon has isotopes with mass numbers 12 and 14.