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What is the percentage of radioactive nuclei left after 3 half-lives have passed?

12.5%


What is the percentage of radioactive nuclei left after 3 half life pass?

12.5%


What is the percentage of radioactive nuclei left after 3 half lives have passed?

12.5%


What happens to a radioactive material over time?

It disintegrates into its daughter nuclei that are much more stabler than the radioactive nuclei. If a sample of radioacictive material is left it will decay into another element over a period of time. Note that complete decay is not possible. A fraction of the original radioactive material will always remain in the sample.


What are radioactive elements on the periodic table?

Some examples of radioactive elements on the periodic table include uranium, thorium, radium, and plutonium. These elements have unstable atomic nuclei that decay over time, emitting radiation in the process.


What is the longest radioactive halflife?

First, it isn't very accurate to talk about a radioactive "element"; you should talk about radioactive isotopes. Different isotopes of the same element can have very different behavior in this sense. For example, hydrogen-1 and hydrogen-2 are stable, while hydrogen-3 is not (half-life about 19 years).Individual atoms, in a radioactive isotope, will decay at a random moment. The half-life refers to how long it takes for half of the atoms in a given sample to decay (and convert to some other type of isotope).


What is the difference between radioactive decay and radiometric dating?

It is the difference between sand running out of an hour glass and determining what time it is by how much sand is left. Radioactive decay happens at a steady rate. If you can determine how much of that radioactive isotope ought to have been in a sample at the start and you can measure how much is left, you can tell how much time has passed.


How do groups on the periodic table compare?

Radioactive elements are in the groups (columns) to the left. On the right, there is non-radioactive metals, gases, and metalloids.


What happens after the radioactive half life has expired?

1/2 of what is left.


When radioactive decays stop?

It will stop when there is nothing left to decay. There is basically no way to stop certain nuclides (isotopes) from decaying.


The nucleus or atom left behind when a nucleus disintegrates or splits is?

Sometimes radioactive


How much percentage of germs is left on your hands after washing them?

i think about 50 to 60 percentage of germs is left on your hand