In ordinary water, exactly 0 atoms as Tritium decays too rapidly (halflife 12.26 years) for any that was on earth when it formed (billions of years ago) to remain. In contaminated water, either deliberately or accidentally, it would depend on how much contaminate was added and the tritium concentration in it. Tritium can only be manufactured somewhere there is a high neutron flux (e.g., nuclear reactor or bomb, a star).
The half-life of tritium is around 12.3 years. To calculate the time it takes for 16.0 ng to decay to 2.0 ng, you would need to determine how many half-lives it would take for the remaining amount to reach 2.0 ng. With each half-life, the amount of tritium is reduced by half.
It would take 4 half-lives for a 4.0 mg sample of X to decay to 0.50 mg. Since the half-life is 2.0 years, it would take 8.0 years for this decay to occur.
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.
Vienna ocean mean water has 1.85 +/- 0.36 x 10^-11 pmm of tritium
Tritium (Hydrogen-3, H3, T) has 1 Proton, 2 Neutrons, and 1 Electron.
The half-life of tritium is around 12.3 years. To calculate the time it takes for 16.0 ng to decay to 2.0 ng, you would need to determine how many half-lives it would take for the remaining amount to reach 2.0 ng. With each half-life, the amount of tritium is reduced by half.
The half life of Tritium is 12.32 years. it would therefore take 24.64 years for the amount to fall to a quarter of the original.
It would take 4 half-lives for a 4.0 mg sample of X to decay to 0.50 mg. Since the half-life is 2.0 years, it would take 8.0 years for this decay to occur.
Depending on the isotope: - for 235U: 7,038.108 years - for 238U: 4,468.109 years etc.
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.
If you mean decades then there are 10 decades in 100 years
All hydrogen atoms, regardless of the number of neutrons in its isotope (zero neutrons for protium, one for deuterium, two for tritium), would have only one proton.
2
One
it was important because they wanted the bodies to be preserved well fr the afterlife.it preserves the body for many years and would not decay in its tomb.
Zr 94: half life 1,1.1017 years, double beta decay Zr 96: half life 2,0.1019 years, double beta decay
Vienna ocean mean water has 1.85 +/- 0.36 x 10^-11 pmm of tritium