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An eighth.
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What is a half-line of a radioisotope if a 50-g sample becomes 25g after 18 days?
A half-life of a radioisotope is the time required for half of a sample to decay. In this case, a 50-g sample becoming 25 g after 18 days indicates that the half-life of the radioisotope is 18 days, as the sample has decreased to half its original amount in that time.
What is the half-life of a radioisotope if a 50-g becomes 25 g after 18 years?
18 years. Half-life is defined as the time it takes 50% of the nuclide to decay.
How long will it take for the reactant concentration to drop to 18 of its initial value?
The problem was not given. If it has a constant rate of 6.70 times 10 up to the 3. the half life would be 0.693 k. So one eighth of initial value would be calculated by multiplying one half by its self 3 times. So it would be 3 half lifes.
What is the life span of a pancreatic cells?
I dont know cant find the answer any where and i need this answer for my biology essay
What is the period and group of element having 18 neutrons?
Many isotopes have 18 neutrons.
What is the half life of a radioisotope if a 50 sample becomes 25 after 18 days?
18 days
What is a half-line of a radioisotope if a 50-g sample becomes 25g after 18 days?
A half-life of a radioisotope is the time required for half of a sample to decay. In this case, a 50-g sample becoming 25 g after 18 days indicates that the half-life of the radioisotope is 18 days, as the sample has decreased to half its original amount in that time.
What is the half life of a radioactive isotope if it takes 6.2 days for a 72 gram sample to decay to 18grams?
18 grams are one fourth of the original sample mass of 72 grams. Accordingly, the half life is 6.2/4 = 1.55 days.
What is the half-life of the element that registers 360 counts per hour and 18 hours later the rate becomes 45 counts per hour?
After 3 half lifes there will 45 counts per hour (360 -> 180 -> 90 ->45). Therefore 3 half lifes equals 18 hours. One half life is therefore 6 hours.
How many hours are there in 9 in a half days?
18
What is the half-life of a radioisotope if a 100 g sample becomes 50 g after 20 years?
18 days
If you have 16 g of a substance that has a half-life of 3 days after 12 days you will have how much of the substance remaining?
12 days represents four half-lives in this case. Therefore you would have a half of a half of a half of a half of 16 g, or 1/16 * 16 g, or 1 g. You'd also have 15 g of something else. The object doesn't actually disappear, it just changes into a different substance.
How long will flexeril appear in urine?
How long a drug stays in your blood and/or urine is usually determined by its half-life. The half-life of a drug is the time it takes your body to metabolize and excrete the medication. Flexeril has a half-life of 18 hours, so it would take 3.75 days for it to clear out of your body completely.
If a man and a half can tarmac a road and a half in a day and a half how many roads can six men tarmac in seven days?
18
What is the half-life of a radioisotope if a 50-g becomes 25 g after 18 years?
18 years. Half-life is defined as the time it takes 50% of the nuclide to decay.
Which element has the lowest half-life?
Bismuth has recently been found to have a no stable isotope and has a half-life of 4.6 x 10^19 years. Also, the simple hydrogen atom (a single proton), is theorized to decay at a rate of 6.6 x 10^33 years. So far all tests to observe a proton decay have failed.
What are the characteristics of Ununpentium?
Ununpentium, also known as element 115, is a synthetic, highly unstable element with a very short half-life. It is a superheavy element that has not been observed in nature and is primarily produced in particle accelerators. Its properties and characteristics are still being studied due to its extremely short existence.
