Physics, asked by gulshan4298, 11 months ago

The time during which the quantity of any radioactive meterial becomes half of its original value is called​

Answers

Answered by Anonymous
0
Half life is the time that a radioactive substance takes to become half of the initial quantity.

So obviously after half life has passed the radioactive substance will be half of its initial quantity.

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Answered by marishthangaraj
0

The time during which the quantity of any radioactive material becomes half of its original value is called​ half life.

Explanation:

  • It’s usually used in connection with radioactivity to describe the time taken for a radioactive substance to decay to half of its original value.
  • Decay means it loses energy (and hence mass) by emitting radiation. So if it started out with a certain mass, after some time it has half that mass; that is its half-life.
  • Some of the particles emitted are ‘alpha’ particles consisting of two neutrons and two protons - a helium atom nucleus.
  • As the substance throws this out, it loses mass and transmutes into another element having an atomic number 2 less.
  • On the other hand it might emit a beta particle, which can cause the nucleus to convert a neutron into a proton, thus increasing the atomic number by 1.
  • If the resulting element is stable, it will stop emitting altogether, but if it’s unstable, this process can continue through multiple steps until a stable nucleus arises.
  • The point is that as an atom of a radioactive element emits radiation it changes into a different element.

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