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Setler [38]
3 years ago
10

The half-life of a radioisotope is the amon the symbol 42He, the subscript 2 is the _____ for helium and the superscript 4 is th

e _____ for helium.
unt of time it takes for
Biology
1 answer:
marshall27 [118]3 years ago
7 0

The half-life of a radioisotope is the amon the symbol 42He, the subscript 2 is the mass number for helium and the superscript 4 is the atomic number for helium.

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