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Question

Which of the following is an example of isobars?

A
Calcium and helium
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B
Sodium and argon
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C
Calcium and argon
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D
Sodium and helium
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Solution

The correct option is B Calcium and argon
Isobars are elements who have same numbers of nucleons(proton + neutron).
In case of Ca and Ar no. of (protons + neutron) = 40

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