Question

The atoms of different elements having same mass number, but different atomic

number are called isotopes. <== correct the statement _​

Answer 1

Explanation:

Those elements that have the same atomic number but a different mass number are referred to as isotopes. Isotopes occur due to the presence of a different number of neutrons in elements having the same atomic number as mass number is the sum of the number of neutrons and protons.

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Answer 2

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The atoms of different elements having same mass number but different atomic number are known as isobars. The sum of protons and neutrons, in the isobars is always different.