Question

What is isotopes. and isobars​

Answer 1

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• Isotope, one of two or more species of atoms of a chemical element with the same atomic number and position in the periodic table and nearly identical chemical behaviour but with different atomic masses and physical properties. Every chemical element has one or more isotopes.
• Isobars are atoms (nuclides) of different chemical elements. ... Isobars: Atoms of different elements with different atomic numbers, which have the same mass number, are known as isobars. Isotopes have the same number of protons so their atomic numbers and chemical properties are the same.

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Answer 2

The 1st attachment consists the definitions of isobar.

The 2bd attachment consists the definition of isotopes.