Physics ATOMS

Isotones

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.

Similarly, `text( )^(36)S`, `text( )^(37)Cl`, `text( )^(38)Ar`, `text( )^(39)K`, and `text( )^(40)Ca` nuclei are all isotones of `20` because they all contain 20 neutrons.

 
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