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== == Naturally occurring uranium is a mixture of three isotopes. The most abundant (greater than 99%) and most stable is uranium-238 (half-life 4.5 x 109 years); also present are uranium-235 (half-life 7 x 108 years) and uranium-234 (half-life 2.5 x 105 years). Different isotopes have different half-lives. The most stable isotope of uranium, 238U, has a half-life of about 4.5 billion years.
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How much thorium-234 will remain after 2 half lives?
After 2 half-lives, 25% of the original amount of thorium-234 will remain. This is because half of the substance decays in each half-life period.
How much mass remains in Thorium 234 after a half?
After 24,10(3) days (the half-time of this isotope) the mass is 50 %.
How many grams of Thorium-234 would be left after 96 days if there were 4 grams to start with?
After 96 days, there would be approximately 1 gram of Thorium-234 left from the initial 4 grams. Thorium-234 has a half-life of 24.1 days, so after each half-life, the amount of Thorium-234 would be halved.
What radioactive substance has the longest half-life?
One of the radioactive substances with the longest half-life is thorium-232, with a half-life of about 14 billion years. Another example is uranium-238, which has a half-life of about 4.5 billion years.
What period does thorium belong in?
Thorium is a member of the actinoids family, period 7 in the periodic table of Mendeleev. The half life of 232Th is 1,405.1010 years.
How long will it take a 2kg sample of Thorium-219 to decay to 15.6g?
Thorium-219 has a half-life of about 1.4 minutes. To calculate the time it takes for a 2kg sample to decay to 15.6g, you would need to use the radioactive decay formula. This would involve determining the number of half-lives it takes for the 2kg sample to decay to 15.6g.
How much thorium-234 will remain after 2 half lives?
After 2 half-lives, 25% of the original amount of thorium-234 will remain. This is because half of the substance decays in each half-life period.
How much mass remains in Thorium 234 after a half?
After 24,10(3) days (the half-time of this isotope) the mass is 50 %.
How much thorium in grams is there in 2 half lives?
To calculate the amount of thorium remaining after 2 half-lives, you use the formula: amount = initial amount * (1/2)^n, where n is the number of half-lives. If we assume the initial amount is 1 gram, after 2 half-lives, there would be 0.25 grams of thorium remaining.
How long will it take 50 milligrams of thorium-232 to deacy to 25 milligrams?
Approximately 14 billion years, the half-life of Thorium 232
Thorium-234 has a half-life of 24.1 days. How much of a 100-g sample of thorium-234 will be unchanged after 48.2 days?
Thorium-234 has a half-life of 24.1 days. How much of a 100-g sample of thorium-234 will be unchanged after 48.2 days?
How many grams of Thorium-234 would be left after 96 days if there were 4 grams to start with?
After 96 days, there would be approximately 1 gram of Thorium-234 left from the initial 4 grams. Thorium-234 has a half-life of 24.1 days, so after each half-life, the amount of Thorium-234 would be halved.
What radioactive substance has the longest half-life?
One of the radioactive substances with the longest half-life is thorium-232, with a half-life of about 14 billion years. Another example is uranium-238, which has a half-life of about 4.5 billion years.
Thorium-234 has a half life of about 24 days of a sample that originally contained 100 grams of thorium-234 now only contains 25 grams.what is the age of the sample?
25 grams of Thorium-234
What period does thorium belong in?
Thorium is a member of the actinoids family, period 7 in the periodic table of Mendeleev. The half life of 232Th is 1,405.1010 years.
Is thorium reactive to magnets?
No, thorium is not reactive to magnets as it is not a ferromagnetic material. Thorium is a weakly paramagnetic material, meaning it only shows a very small magnetic response when exposed to a magnetic field.
What is the half life of uranium 238?
The half-life of uranium-238 is about 4.5 billion years. This means that it takes 4.5 billion years for half of a sample of uranium-238 to decay into thorium-234.
