Question

define isotones with examples
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Answer 1

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Two nuclides are isotones if they have the same neutron number N, but different proton number Z. For example, boron-12 and carbon-13 nuclei both contain 7 neutrons, and so are isotones. In contrast, the proton numbers for which there are no stable isotopes are 43, 61, and 83 or more.

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Answer 2

Answer :

Two nuclides are isotones if they have the same neutron number N, but different proten number Z, for example ,boran-12 and carbon-13 nuclei both contain 7 neutron, and so are isotones are similarly,365,37C,38Ar,39k,and 40.ca nuclei are all isotones of 20 because they all contain 20 neutron.