[Answer] What makes an element and isotope?

Answer: The mass number is different

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What makes an element and isotope? A nuclide is a species of an atom with a specific number of protons and neutrons in the nucleus for example carbon-13 with 6 protons and 7 neutrons. The nuclide concept (referring to individual nuclear species) emphasizes nuclear properties over chemical properties whereas the isotope concept (grouping all atoms of each element) emphasizes chemicalover nuclear. The neutron number has large effects on nuclear properties but its effect on chemical properties is negligible for most elements. Even for the lig… The atoms of a chemical element can exist in different types. These are called isotopes. They have the same number of protons (and electrons ) but different numbers of neutrons. Different isotopes of the same element have different masses. Mass is the word … Stable nuclide - Wikipedia List of elements by stability of isotopes - Wikipedia Isotope - Wikipedia Stable isotope ratio - Wikipedia Isotope analysis is the identification of isotopic signature the abundance of certain stable isotopes and chemical elements within organic and inorganic compounds. Isotopic analysis ...

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