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What is an isotope?

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It is  an  atom  of  the  same  element , same  atomic  number  but  different  mass number
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Atoms of the same element with the same atomic number but different mass number
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An isotope is an atom of same atomic number but different mass number

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They are atoms of the same element with the same atomic number but a different mass number 
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Refers to atoms of the same element with the same atomic number but different mass number

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Isotopes are atoms of same element,same atomic number but different mass number.
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Isotopes are atoms of the same element with the same atomic number but different mass number
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An isotope is a variant of a chemical element that has the same number of protons but a different number of neutrons in its atomic nucleus. This means isotopes of a particular element have the same atomic number (which defines the element) but different mass numbers. Due to the varying number of neutrons, isotopes of an element may exhibit different atomic masses.

For example, carbon has three isotopes: carbon-12, carbon-13, and carbon-14. All three isotopes have six protons (defining them as carbon) but differ in the number of neutrons. Isotopes can have different physical properties, such as stability and radioactivity, but they share similar chemical properties because they have the same number of protons and, therefore, the same electron configuration.







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Are atoms with same element with same atomic number but different mass number due to different number of protons
 
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Atoms of the same element with the same atomic number but different mass number
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