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Question

Which of the following is false regarding an isotope?

A
Same atomic number
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B
Different number of neutrons
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C
Same mass number
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D
Same number of the electrons
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E
Same number of protons
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Solution

The correct option is C Same mass number
Isotopes are variants of a particular chemical element which differ in neutron number, although all isotopes of a given element have the same number of protons in each atom. They have same atomic number. The number of nucleons (both protons and neutrons) in the nucleus is the atom's mass number, and each isotope has a different mass number.

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