25a 377 b61 8a2 0dd afc 25f 498 c05 5a1 366 113 531 aef 387 07e 556 712 357 1de 779 e9f c68 9ba 3f3 cae 62b 2b0 c17 3b1 bd6 99e 314 07e 601 ffc d8c 8cd 330 1fd 0f4 f2b fa8 036 ab8 772 5be 0ae 24c 3d2 2fa 035 7e2 8ce 278 7f1 2b6 181 89b 109 1bb b88 12c ef4 4c8 662 387 729 6a0 88d b5e 675 270 2ad d98 e65 845 8d7 fd4 872 dd1 f99 a96 a99 eb9 f9a 708 305 29b fb3 68f 2cf bc5 c78 94a 571 892 139 23b 6bc

Radioactivity is the spontaneous emission of radiation in the form of particles or high energy photons resulting from a nuclear reaction. It is also known as radioactive decay, nuclear decay, nuclear disintegration, or radioactive disintegration.

What is meant by radioactivity?

As its name implies, radioactivity is the act of emitting radiation spontaneously. This is done by an atomic nucleus that, for some reason, is unstable; it "wants" to give up some energy in order to shift to a more stable configuration.

What is meant by radioactivity give two example?

For example, a light bulb may emit radiation in the forms of heat and light, yet it is not radioactive. A substance that contains unstable atomic nuclei is considered to be radioactive. Radioactive decay is a random or stochastic process that occurs at the level of individual atoms.

What is radioactivity Slideshare?

Radioactivity • The nuclei of naturally occurring heavy elements like U, Th, Ra and Po are unstable and keep on emitting spontaneously invisible rays or radiations (α, β, γ -rays) and give more stable elements. 3. Radioactivity • These heavy elements are called radioactive elements. •

What is radioactivity Wikipedia?

Radioactivity is a measure of the total, local rate of radionuclides decaying per unit time and is dependent upon the total number of atoms, decay constants, and all decay branching pathways for each radionuclide present.

What is the SI unit of radioactivity?

becquerel (Bq) The System International of units (SI system) uses the unit of becquerel (Bq) as its unit of radioactivity. One curie is 37 billion Bq.

What is radioactivity caused by?

What causes atoms to be radioactive? Atoms found in nature are either stable or unstable. An atom is stable if the forces among the particles that makeup the nucleus are balanced. An atom is unstable (radioactive) if these forces are unbalanced; if the nucleus has an excess of internal energy.

What is meant by natural radioactivity?

The phenomenon of spontaneous and continuous and uncontrollable disintegration of an unstable nucleus accompanied by the emission of active radiations is called natural radioactivity. The substance which exhibits radioactivity is called a radioactive substance. e.g. Uranium, thorium, radium, etc.

Who is the father of radioactivity?

physicist Henri Becquerel In one of the most well-known accidental discoveries in the history of physics, on an overcast day in March 1896, French physicist Henri Becquerel opened a drawer and discovered spontaneous radioactivity.

What is radioactivity BYJU’s?

Radioactivity is the phenomenon exhibited by the nuclei of an atom as a result of nuclear instability. In the year 1896, Henry Becquerel discovered this phenomenon. Radioactivity is a process by which the nucleus of an unstable atom loses energy by emitting radiation.