[Answer] The atomic symbol mc025-1.jpg 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? 40 19 K

Answer: 40 18 Ar

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The atomic symbol mc025-1.jpg 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? 40 19 K Potassium-40 ( 40 K ) is a radioactive isotope of potassium which has a long half-life of 1.251 × 10 9 years. It makes up 0.012% (120 ppm) of the total amount of potassium found in nature.. Potassium-40 is a rare example of an isotope that undergoes both types of beta decay .In about 89.28% of events it decays to calcium- 40 ( 40 Ca) with emission of a beta particle (β − an electron) with a ... element by radioactive decay : Atomic number color: ... 19 : potassium: 2: 1: 39 K : 41 K: 40 K : 37: rubidium: 1: 1: 85 Rb: 87 Rb 55: caesium : 1 — 133 Cs 87: francium — — No primordial isotopes (223 Fr is a radiogenic nuclide) Radioactive : 40 K t 1/ Fri Jan 01 2021 13:30:00 GMT-0500 (Eastern Standard Time) .25 × 10 9 years; 87 Rb t 1/2 4.9 × 10 10 years; 223 Fr t 1/2 22.0 min. All the alkali metals have odd atomic numbers; hence their ... Isotope - Wikipedia Isotope - Wikipedia Uranium-238 - Wikipedia Potassium-40 - ...

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