Jun 27, 2016 · Here's what I got. Strontium-90, ""^90"Sr", undergoes beta minus decay, so your goal here will be to use what you know about the emission of a beta particle to figure out the …

Oct 20, 2015 · "56 years" A radioactive isotope's nuclear half-life tells you how much time must pass until an initial sample is halved. In your case, strontium-90 is known to have a half-life of …

Jun 26, 2016 · t_"1/2" = "29 years" The nuclear half-life of a radioactive nuclide, t_"1/2", is defined as the time needed for a sample of this nuclide to decay to half of its initial mass. The first …

May 31, 2015 · When uranium-235 undergoes a neutron-induced fission reaction, it will split into two smaller nuclei, which, in your case, are tellurium-137, ""^137"Te", and zirconium-97, …

Jan 15, 2017 · 0,25 g If the half-life of Sr-90 is 25 years it means that after 25 years its amount will be half the initial quantity. If you have 4,00 g, after 25 years you have 2,00 g; after 50 years …

Jun 7, 2017 · After four half lives 20.3125 is remaining and the sample is 115.2 years old. We start with 325 and divide by two this accounts for one out the four half lives. Which is 162.5 …

The half-life of strontium-90 is 28 years. How long will it take a 44 mg sample to decay to a mass of 11 mg? Thorium-234 has a half-life of 24 days. if you started with 100 gram sample of …

Oct 25, 2015 · In this case, you are dealing with a strontium-90 isotope #""_38^90"Sr " -> # strontium-90 Read more about why stronyium-90 is considered a hazardous isotope here:

Jul 16, 2014 · The sums of the superscripts and of the subscripts must be the same on each side of the equation. Here are some links that show how to balance nuclear equations. http ...

Jun 1, 2018 · 123 years, to three significant figures 94.99% of a quantity gone means that 5.01% is left, or, fractionally, 0.0501 of it. When one half-life has elapsed, 0.5 of it is left. The question …