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Biology, 29.10.2020 21:20 vicinimlv19

The atomic symbol Superscript 40 subscript 19 upper K. represents potassium-40 (K-40), a radioactive isotope that has 19 protons and 21 neutrons. Which atomic symbol could represent an isotope that results from the decay of K-40? Superscript 40 subscript 18 upper A r.
Superscript 40 subscript 18 upper K
Superscript 42 subscript 20 upper C a
Superscript 42 subscript 20 upper K.

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The atomic symbol Superscript 40 subscript 19 upper K. represents potassium-40 (K-40), a radioactive...
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