No such thing as ratio decay. Sorry
It is because living organisms absorb C14 from their environment. After death, they are no longer capable of absorbing any more C14. So, at the time of death, the C14 : C12 ratio is fixed. C14 undergoes radioactive decay (into C12) so the C14 : C12 ratio declines and that can be used as a measure of the time since death.
Nuclear instability is when the nucleus of an atom is unstable because of an improper ratio of protons to neutrons. Nuclear instability causes radioactive decay because the nucleus emits radiation to stabilize itself.
alpha decay
Yes, but the rate of decay depends on the conditions.
There are 3 naturally occurring isotopes of Uranium, all decay by alpha to Thorium:238U --> 234Th + 4He235U --> 231Th + 4He234U --> 230Th + 4He
only the gamma decay.
Beta decay to increase the ratio of protons to neutrons
It is the rate at which somthing decays or breaks down.
The ratio neutrons/protons in radioactive isotopes is the cause of their innstability.
Alexandra Heath has written: 'Measurement of the [nuclear formula] beta decay branching ratio'
The basic idea is to measure the amount of the radioactive isotope, and of one or more of its decay products. The older the rock, the larger the percentage of the original isotope that decayed - so the ratio between the original isotope and the decay product changes over time.
Instability is due to a certain ratio between neutrons and protons in the atomic nucleus.
When a nucleus is unstable it has either too many or too few neutrons in the nucleus. This is what causes nuclear decay as the nucleus needs to have the correct ratio of neutrons to protons to be stable. It may be triggered by an outside force, such as a colliding particle, or simply by chance.
Radioactive decay happens to the unstable atom nuclei in its efforts striving to reach stability. The nucleus of any element atom should have specific neutron/proton ratio to be a stable nucleus. Also, the absolute number of protons should not exceed certain limit.For a nucleus with neutron/proton different than the stability ratio, radioactive decay occurs to reach the stability ratio. For a nucleus with the absolute number of protons exceeding a certain limit, the nucleus may reach stability by radioactive decay and/or fission of the nucleus into two or more smaller nuclei with emission of one or more neutrons (as the spontaneous fission of one of the plutonium isotopes) and gamma electromagnetic radiation.For more details:For a nucleus with neutron/proton is higher than the stability ratio, two types of radioactive decay may occur to decrease the ratio in the nucleus in order to reach stability:radioactive beta decay: in which a neutron transforms into proton plus electron where the proton remains in the nucleus and the electron is emitted from the nucleus as beta radiationradioactive neutron decay: in which a neutron is emitted from the nucleus as neutron radiation (this transformation is relatively rare. Example of this transformation is the unstable Krypton-87)For a nucleus with neutron/proton is lower than the stability ratio, two types of radioactive decay may occur to increase the ratio in the nucleus in order to reach stability:radioactive proton decay: in which a proton in the nucleus transforms into neutron plus positron where the neutron remains in the nucleus and the positron is emitted from the nucleus as positive beta radiationproton attraction of one electron from the nearest orbit to the nucleus to form neutron that remains in the nucleus.For an unstable nucleus with number of protons exceeding the stability limit, the nucleus may reach stability with one or more of the above four nuclear transformations or by:fission of the nucleus into two or more smaller nuclei with emission of one or more neutrons (as the spontaneous fission of one of the plutonium isotopes).
Radioactive decay happens to the unstable atom nuclei in its efforts striving to reach stability. The nucleus of any element atom should have specific neutron/proton ratio to be a stable nucleus. Also, the absolute number of protons should not exceed certain limit.For a nucleus with neutron/proton is higher than the stability ratio, two types of radioactive decay may occur to decrease the ratio in the nucleus in order to reach stability:radioactive beta decay: in which a neutron transforms into proton plus electron where the proton remains in the nucleus and the electron is emitted from the nucleus as beta radiationradioactive neutron decay: in which a neutron is emitted from the nucleus as neutron radiation (this transformation is relatively rare. Example of this transformation is the unstable Krypton-87)For a nucleus with neutron/proton is lower than the stability ratio, two types of radioactive decay may occur to increase the ratio in the nucleus in order to reach stability:radioactive proton decay: in which a proton in the nucleus transforms into neutron plus positron where the neutron remains in the nucleus and the positron is emitted from the nucleus as positive beta radiationproton attraction of one electron from the nearest orbit to the nucleus to form neutron that remains in the nucleus.For an unstable nucleus with number of protons exceeding the stability limit, the nucleus may reach stability with one or more of the above four nuclear transformations or by:fission of the nucleus into two or more smaller nuclei with emission of one or more neutrons (as the spontaneous fission of one of the plutonium isotopes).
Amount of certain radioactive isotope in an object is compared with a reference amount. this ratio can then be used amount.
Amount of certain radioactive isotope in an object is compared with a reference amount. this ratio can then be used amount.