Asked in Job Training and Career QualificationsPhysicsChemistry
Job Training and Career Qualifications
What affects half-life?
July 08, 2012 5:16PM
The half-life of a radioactive isotope is not affected by environmental conditions, such as temperature and pressure. For all practical purposes, it can be considered as fixed.
Asked in Chemistry, Physics
In years what is the half life of uranium 235 and 238?
Asked in Radioactive Decay, Uranium
What is the correct order of nuclear decay mode for the changes from U-238 to U-234?
Asked in Video Games
Where can I download halflife that works on my removable drive?
Asked in Physics, Nuclear Physics
How do you decrease half life of a radioactive element'?
Asked in Nuclear Physics
How much element remains after 2 days in a half life?
Asked in Physics, Chemistry, Nuclear Physics
Half of the total amount of time it takes for all of a radioactive substance to decay is called the halflife of the substance?
Asked in Radioactive Decay
What types of objects would you do carbon dating on?
What are the 5 uses of the element neptunium?
Except for Neptunium-236 and Neptunium-237 all the isotopes of this element have practically negligible halflives and thus little use except to produce their decay products. Neptunium-234 is fissionable but has a halflife of only 4.4 days and tends to decay by alpha or positron emission. Neptunium-235 has a halflife of 1.2 years and decays mostly by alpha emission. Neptunium-236 is fissionable has a halflife of about 5000 years and decays primarily by beta emission to Plutonium-236. Neptunium-237 is a neutron poison, shutting down fission, has a halflife of 2.2 million years and decays by alpha emission. Neptunium-238 is fissionable but has a halflife of 2.1 days and decays by beta emission to Plutonium-238. Neptunium-239 is a mild neutron poison, has a halflife of 2.33 days and decays by beta emission to Plutonium-239; a highly fissile isotope suitable for weapons. Neptunium-240 has a halflife of 1 hour and decays by beta emission to Plutonium-240; an isotope that has a high rate of spontaneous fission. Too much Plutonium-240 makes it impossible to build a reliable weapon and exposes workers to excessive gamma radiation.
Asked in Nuclear Physics, Isotopes
What can be done to change the half-life of a radioactive isotope?
Asked in Physics, Earth Sciences, Nuclear Physics
What is a human half life?
The primary source of radioactivity in the human body is Carbon-14. However the level of Carbon-14 remains constant in the body as the human body is in equilibrium with the atmosphere as long as the body is alive. Therefor there is no halflife until the body dies; then it matches the halflife of Carbon-14.