Consider the three equations below. Superscript 14 subscript 7 upper N plus superscript 1 subscript 1 upper H right arrow superscript 15 subscript 8 upper O. Superscript 4 subscript 2 upper H e plus superscript 4 subscript 2 upper H e right arrow superscript 8 subscript 4 upper B e. Superscript 28 subscript 14 upper S i plus 7 superscript 4 subscript 2 upper H e right arrow superscript 56 subscript 28 upper N i. Which statement do these reactions best support?
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