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How many years would it take for 75 percent of potassium to disintegrate?
Wiki User
∙ 8y ago
Potassium has several radioactive isotopes with different half lives, but I presume you are thinking of K-40, the one used in potassium argon dating. Any isotope decays by half in one half life, so you'd need 2 half lives for 75% to decay. The half life of K-40 is 1.248 x 10^9 years, so the answer is 2.496 x 10^9 years.
Wiki User
∙ 8y ago
Wiki User
∙ 8y ago99.99 percent of potassium is either in the form of 39K or 41K. Both isotopes are stable so that even if you wait forever, you will not get more than 0.012 to disintegrate!
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What is the age of a mineral that contains 25 percent parent and potassium 40 and argon 40 and 75 percent daughter and the half life potassium 40 is 1.25 billion years?
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What is the age of a mineral that contains 25 percent parent and potassium 40 and argon 40 and 75 percent daughter and the half life potassium 40 is 1.25 billion years?
It is 2.5 billion years.
How long does a Disposable Diaper disintegrate?
400 years
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Potassium 40 is an isotope with 19 protons (and electrons) and 21 neutrons. Potassium 40 accounts for around 0.012% of potassium and is fairly stable (half life of 1.25 billion years).Potassium 40 is an isotope with 19 protons (and electrons) and 21 neutrons. Potassium 40 accounts for around 0.012% of potassium and is fairly stable (half life of 1.25 billion years).Potassium 40 is an isotope with 19 protons (and electrons) and 21 neutrons. Potassium 40 accounts for around 0.012% of potassium and is fairly stable (half life of 1.25 billion years).Potassium 40 is an isotope with 19 protons (and electrons) and 21 neutrons. Potassium 40 accounts for around 0.012% of potassium and is fairly stable (half life of 1.25 billion years).
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Aluminium Oxide
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Wood is a fiberous material and it decomposes with time. Chemically treated wood takes longer to rot away but that would depend on the environmental location.
