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Virty [35]
2 years ago
10

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.
Chemistry
1 answer:
Oksana_A [137]2 years ago
8 0

Answer:

40/18AR

Explanation:

sorry my answer was late but i hope this helps someone else! I got it right on the test

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