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13.5 billion years

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How many years will it take for 10g of radioactive uranium to decay into 5g of radioactive uranium?

Depending on the isotope: - for 235U: 7,038.108 years - for 238U: 4,468.109 years etc.


A specimen of uranium has half-life of 4.5 billion years How many years will it take one gram of this uranium to become 0.25 grams?

Approx. 9 billion years.


How many years will it take for 10 g of radioactive uranium to decay into 5 g of radioactive uranium?

It would take one half-life for the 10 g of uranium to decay into 5 g. The half-life of uranium is around 4.5 billion years, so it would take approximately 4.5 billion years.


How many years in 3.5 years?

Three and a half years.


What is halflife of uranium?

Uranium has 29 natural and artificial isotopes. Each isotope has his specific half life; for the natural isotopes the half lifes are: U 234: approx. 2.45 x 105 years U 235: approx. 7.04 x 108 years U 238: approx. 4.46 x 109 years


How many years are 14 seasons?

Three and a half years.


600 grams of uranium after 3 half lives how many grams would there be?

1 ounce and three large testes


How many years to get a degree in temple university?

Three and a half years


How many years will it take for uranium-235 to go through 3 half lives?

[(7,038 ± 0,005) .108 years] x 3


How many years would it take for half of the atoms in uranium to change into lead?

The half-life of 214Bi is 19.7 minutes. However, it has two decay modes, neither of which leads directly to lead; that complicates things. One of the decay modes leads to 214Po, which then quickly (half-life 0.0016 seconds) decays to 210Pb. The other one leads to 210Tl, which has a half-life of 1.3 minutes and also decays to 210Pb. So: Half of the 214Bi will be gone in 19.7 minutes; a bit after that half the sample will be 210Pb.


How many months in three and a half years?

42 months


If you start with 60 atoms of uranium - 238 how many remain after 4470000000 years?

After 4.47 billion years, roughly half of the original atoms of uranium-238 would have decayed to lead-206 through alpha decay. This means there would be about 30 atoms of uranium-238 remaining.