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How old in years is a fossil sample that has 12.5 percent C-14?
The half-life of Carbon-14 is 5,730 years. As such for the carbon-14 to decay from 100% to 12.5% it would take three times the half-life of the material.100% (1st half life decay period) 50% (2nd half life decay period) 25% (3rd half life decay period) 12.5%.Therefore = 5730 x 3 = 17,190 years.
What is the half life of promethium?
Promethium 145 has a half life of 17.7 years. Promethium 146 has a half life of 5.53 years. Promethium 147 has a half life of o.22 years.
What is an isotope that the time it takes it to decay to half its original mass?
c.half-life
What is the half life of thorium 219?
== == Naturally occurring uranium is a mixture of three isotopes. The most abundant (greater than 99%) and most stable is uranium-238 (half-life 4.5 x 109 years); also present are uranium-235 (half-life 7 x 108 years) and uranium-234 (half-life 2.5 x 105 years). Different isotopes have different half-lives. The most stable isotope of uranium, 238U, has a half-life of about 4.5 billion years.
A uranium235 sample starts with 200 atoms and 700 million years later there are 100 atoms What is the halflife of uranium235?
700 milliion years. The definition of half-life is the period of time during which one-half of the atoms of an element undergo decay into other elements.
What is the half-life of neptunium-238?
1 day is 3/4th the remaining nucli
How can the element Americium change into the element neptunium?
Americium can change into neptunium through a process called alpha decay. During alpha decay, an alpha particle (helium nucleus) is emitted from the nucleus of the americium atom, resulting in the transformation of the americium atom into a neptunium atom.
Why is it useful to create neptunium by bombardind uranium with protons even though neptunium disintegrates in about two days?
The bombardment of uranium is with neutrons not protons.Neptunium has many isotopes; for example 237Np has a half life of 2,14.106 years.237Np will be used by United States as nuclear weapon.Other possible applications: precursor for the preparation of plutonium isotopes Pu-236 and Pu-238, isotopic tracer, in neutrons detectors.
Where in life do you encounter neptunium?
You have any chance to encounter neptunium.
When neptunium is combined with another element what new compound can it make?
Neptunium is a metal, and therefore it can in theory form all the usual kinds of compounds that metals form; it could combine with oxygen and form neptunium oxide. However, neptunium is a radioactive element with a very short half-life, therefore it does not stick around long enough to engage in chemical reactions, or even if it did, the resulting compound would also exist only for a very brief period of time.
How old in years is a fossil sample that has 12.5 percent C-14?
The half-life of Carbon-14 is 5,730 years. As such for the carbon-14 to decay from 100% to 12.5% it would take three times the half-life of the material.100% (1st half life decay period) 50% (2nd half life decay period) 25% (3rd half life decay period) 12.5%.Therefore = 5730 x 3 = 17,190 years.
What is the half life of promethium?
Promethium 145 has a half life of 17.7 years. Promethium 146 has a half life of 5.53 years. Promethium 147 has a half life of o.22 years.
What is the half life of a radioisotope if a 100g sample becomes 25g after 18 years?
The half-life of the radioisotope is 9 years. This is calculated by determining the time it took for half of the original sample to decay. Since the sample went from 100g to 25g in 18 years, it lost 75g in that time period. After the first half-life, the sample would have 50g remaining, and after the second half-life, it would have 25g remaining.
What is the half life of the radioactive isotope?
The half life is the period of time it takes radioactive decay to transmute one half of the isotope present at the start of the period to a different isotope, usually an isotope of a different element. This period of time is different for different isotopes, with known isotope half lives ranging from femtoseconds to many billions of years.
A potassium 40 sample starts with 50 atoms and 1.25 billion years later there are 25 atoms What is the half life of potassium 40?
1.25 billion years: 25/50 or half the original atoms have disintegrated in 1.25 billion years, and that is the definition of half life.
What is neptunium used for in everyday lives?
Neptunium has not today any use in every day life.
Which element has Highest half life period?
i guess it's Tellurium 128, with a half life of 2.2e24; you may consider it a stable isotope as well.
