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After three half-lives what percent of the radioactive isotope is remaining?
After three half-lives, 12.5% of the radioactive isotope is remaining. This is because each half-life reduces the amount of radioactive material by half.
After one half-life what percent of the original uranium remains?
By definition, 50%. Half life is the time for half of the original sample to decay.
What does 0 percent dilution mean?
0 percent dilution means that no additional solvent or liquid has been added to a solution. The solution remains in its original concentration without any dilution.
How do you measure percent solids?
Percent solids can be measured by dividing the weight of the solid material by the total weight of the sample and then multiplied by 100. This can be done using a drying oven to remove moisture from the sample and then calculating the weight difference before and after drying to determine the percent solids.
Why does the percent ionization of acetic acid increase as the concentration of the solution decreases?
As you increase the concentration of the solution, the concentration of H+ does not change. Meaning, the concentration ionized does not change. Just the original concentration increases. Since percent ionization = (concentration ionized)/(original concentration) , and the original concentration is increased, the percent ionization therefore decreases.
How old is a fossil that has a radioactive material with a half life of 200 years if there is 25 percent of the original radioactive material left?
The fossil would be approximately 600 years old. We can calculate this by determining how many half-lives have passed based on the remaining 25% of the original radioactive material. Since the half-life is 200 years, and with 25% remaining, it means two half-lives have passed (50% after first, 25% after second). Therefore, 2 x 200 = 400 years.
After three half-lives what percent of the radioactive isotope is remaining?
After three half-lives, 12.5% of the radioactive isotope is remaining. This is because each half-life reduces the amount of radioactive material by half.
How much of a 3.0cm material is needed to reduce beam of radiation to 25 percent of its original intensity?
The answer depends on the transmissivity of the material.
How is tossing a coin similar to radioactive decay of an element?
If you toss a coin, there are fifty percent chances of getting the head or tail. In the radioactive decay also fifty percent atoms will brake down. When you toss the coin next time, you have 25 percent chances of getting the head or tail repeated. Same is the case with radioactive material. you will be left with 25 percent of the radioactive material after half life. Third time the chances of getting the same head or tail is 12.5 percent. Here you are left with 12.5 percent of the radioactive material left with after another half life.
The time it takes for 50 percent of the nuclei in a radioactive sample to decay to its stable isotope is called?
The time it takes for 50 percent of the nuclei in a radioactive sample to decay to its stable isotope is called the half-life of the radioactive element. It is a characteristic property of each radioactive isotope and can vary greatly among different elements.
How many Percent does the original remains of the Philippine Forest have?
20 percent of the original remains of the Philippine forest
Tritium has a half life of 12.3 years if 118mg escapes what percent of the spill will remian radioactive in 61.5 years?
After 61.5 years, five half-lives would have passed for tritium (12.3 years x 5 = 61.5 years). Each half-life reduces the amount of radioactive material by half. Therefore, after 61.5 years, 3.125% (0.5^5) of the initial 118mg of tritium would remain radioactive.
What percent expresses a 5 percent decrease in the original whole?
95% You simply subtract the decrease from the original 100%.
A sample of radioactive isotope has a halflife of 1 day how much of the original sample will be left at the end of the fourth day?
If a sample of radioactive material has a half-life of one week the original sample will have 50 percent of the original left at the end of the second week. The third week would be 25 percent of the sample. The fourth week would be 12.5 percent of the original sample.
What percentage of original radioactive atoms are left after 5 half lives?
if you have 100g of a radioactive material with a half life of 5.0 years then, 5.0 years after the material was created there will be 50g of radioactive material left, another 5 years and it will be 25g, then another 5 years 12.5 radioactive material will be left, another 5 years, 6.25g, then 3.125g will be left after another 5 years, that is 25 years so what percent of 100 is 3.125? your answer is 3.125% of the material will be left
How do you do Percent of change?
percent of increase-new-original over originalthen make the decimal a percent of increasepercent of decrease-original-new over originalthen make the decimal a percent of decrease
How do you do percent change?
percent of increase-new-original over originalthen make the decimal a percent of increasepercent of decrease-original-new over originalthen make the decimal a percent of decrease
