Question

give two examples of isotone only elements

Answer 1

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Two nuclides are isotones if they havethe same neutron number N, but different proton number Z. Forexample, boron-12 and carbon-13 nuclei both contain 7 neutrons, and so are isotones. Similarly, 36S, 37Cl, 38Ar,39K, and 40Ca nuclei are all isotones of 20 because they all contain 20 neutrons.
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Answer 2

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