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If a 100 g sample of a radioactive element decays to 25 g in 4 days what is the half-life of the element?
If a radioactive sample contains 1.25g of an isotope with a half-life of 4.0 days, then 0.625g (1/2) of the isotope will remain after 4.0 days, 0.3125g (1/4) after 8.0 days, 0.15625g (1/8) after 12.0 days, etc. AT = A0 2(-T/H)
What is the half life of the Radioisotope Fe55?
The half-life of the radioisotope Fe55 is approximately 2.7 years. This means that after 2.7 years, half of the original amount of Fe55 will have decayed into other elements.
What is the half-life of cobalt-57?
The half-life of cobalt-57 is about 271.74 days.
A radioactive substance has has life of 5 days initial mass of 12kg how much the original isotope will remain after 10 days?
After 10 days, 1/2 of the original isotope will remain since its half-life is 5 days. This means 6kg of the original isotope will remain after 1 half-life, which remains the same after 10 days since another half-life has passed.
How many half life's are there in a 100 year span?
A half life is the time for one half of a radioactive material to decay. Different materials have half-lives of different lengths. Some last only a fraction of a second. Some have a half life of hundreds of thousands of years. Unless you tell us what the material is, we can only answer "that all depends."
How many atoms would remain of Au-198 that has 800 atoms after 8.1 days if its half-life is 2.7 days?
After 8.1 days, three half-lives have passed for Au-198 (2.7 days/half-life * 3 half-lives = 8.1 days). Each half-life reduces the number of atoms by half, so remaining atoms = 800 atoms * (1/2)^3 = 100 atoms.
If a 100 g sample of a radioactive element decays to 25 g in 4 days what is the half-life of the element?
If a radioactive sample contains 1.25g of an isotope with a half-life of 4.0 days, then 0.625g (1/2) of the isotope will remain after 4.0 days, 0.3125g (1/4) after 8.0 days, 0.15625g (1/8) after 12.0 days, etc. AT = A0 2(-T/H)
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?
Does fermium-257 undergo nuclear decay?
Alpha decay to californium 253. The half life of fermium 257 is 100.5 days.
If the half life of an element is 5 days and 100 milligrams of the element is initially available how many milligrams (mg) of the element is available after 20 days?
The answer is 2. If after one half-life only half of the element remains, then after another half-life half of what was there only remains. So a half of a half is a quarter (or a fourth). So that's 2 half-lives.
The half-life of Au-198 is 2.7 days When there are 800 atoms of Au-198 in a sample a scientist starts a stopwatch The scientist stops the stopwatch at 8.1 days how many atoms of Au-198 remaining?
After 8.1 days, three half-lives have passed (8.1 days / 2.7 days = 3). With each half-life, the number of atoms is halved. Therefore, starting with 800 atoms, after three half-lives there would be 800 / 2 / 2 / 2 = 100 atoms remaining.
A 100 gram sample of a radioactive element is present at 9 a.m. on Monday and only 25 grams of the element can be detected at 9 a.m. on Friday. What is the half-life of the source?
The half-life is 2 days. You start with 100 grams. In one half life, you will lose 50 grams and have 50 grams remaining. In a second half-life, you will lose 25 of the 50 grams and have 25 grams left. You will have lost 75 grams of a 100 gram sample of radioactive material and have only 25 grams of it left after two half-lives. That means there are two half-lives from 9 a.m. Monday to 9 a.m. Friday. That's 4 days for 2 half-lives, or 2 days for one half-life.
How much of a 100 g sample of thorium 234 will be unchanged after 48.2 days?
After 48,2 days the amount of Th-234 will be 25 g.
What is the half life of the Radioisotope Fe55?
The half-life of the radioisotope Fe55 is approximately 2.7 years. This means that after 2.7 years, half of the original amount of Fe55 will have decayed into other elements.
What is the half-life of cobalt-57?
The half-life of cobalt-57 is about 271.74 days.
How long does it take for trilipix to be out of your system?
Your question is related to the half life of drug. Above drug has half life of about 20 hours. So it will be out of your system by 5 times it's half life. It means 100 hours. So it will be practically out of your system in about four days from last dose.
The half-life of radon - 222 is 3.823 days. What is the length of 4- half-lives?
The length of four half-lives of radon-222 can be calculated by multiplying the half-life duration by four. Since the half-life of radon-222 is 3.823 days, four half-lives would be 4 × 3.823 days, which equals approximately 15.292 days.
