0
The daughter isotope is 87.5 percent if the half-life of the isotope is 150 million years how old is the sample?
Wiki User
∙ 14y ago
a sample is brought to the laboratory and the chemist determines the percentage of the daughter isotope is 87.5%. if the half-life of the isotope is 150 million years, how old is the sample?
Wiki User
∙ 14y ago
Add your answer:
Earn +20 pts
Which uranium isotope is onley 0.7 percent of natural uranium and is the fissile part?
Uranium 235 is 0.7 percent of natural uranium and is fissile
If an Isotope has a 75 year half life how long until the parent isotope has decayed to 1 percent of the initial number?
It will take between 450 and 525 years.
Is the uranium-235 isotope the most commonly used fuel in fission power plants?
Yes U235 is the fissionable isotope of Uranium. Natural Uranium contains only about 0.7 percent U235, which is enough to produce fission only with a good moderator such as graphite or heavy water. In light water reactors the Uranium has to be enriched to about 4 percent U 235.
How many trees are there in BC?
45% percent of Canada's Forests are forested. That's all.
Which describes oxygen content as Earth evolved over time?
Oxygen levels stay above 15 percent starting 200 million years ago
Why is each isotope's mass multiplied by the isotope's percent abundance?
That is done to calculate the weighted average.
How do you calculate the atomic weight of a chemical element that has two or more isotopes?
Calculation of the atomic weight of an element having many isotopes:ia - atomic mass of the isotope a x percent concentration of the isotope in the elementib - atomic mass of the isotope b x percent concentration of the isotope in the elementic - atomic mass of the isotope c x percent concentration of the isotope in the element...........................................................................................................................iz - mass of the isotope z x percent concentration of the isotope in the elementMake the sum: I = ia + ib + ic + ..... izThe atomic weight of the element is: I/100 (the term weight is recommended by IUPAC in this case).
What is the percent of 22 million?
22 million = 2,200 million percent
What is the natural percent abundance of the heavier isotope of gallium?
5%
Consider an element Z that has two naturally occurring isotopes with the following percent abundances the isotope with a mass number of 19 is 55 percent abundant the isotope with a mass number?
19.9
What is the percent of 4.6 million?
It is 460,000,000% (460 million percent).
What is 7.5 percent of 280 million?
7.5 percent of 280 million is 21 million.
What is 28 million percent of 2 percent?
28 million percent of 2% is 5,600
What is 10 percent of 10 million?
10 percent of 10 million is 1 million.
What is 53 percent of 9 million?
53 percent of 9 million is 4.77 million.
The 1st isotope occurs 75.47 percent of the time and has a mass of 248.7 amu the 2nd isotope occurs 24.53 percent of the time and has a mass of 249.4 amu calculate the average atomic mass?
248.90
How do you write 1.3 million in percent form?
1.3 million = 1,300,000 = 130,000,000% (130 million percent)
