General Knowledge - Physics - Discussion

Neutrons are high-speed nuclear particles that have an exceptional ability to penetrate other materials. Of the five types of ionizing radiation discussed here, neutrons are the only one that can make objects radioactive. This process, called neutron activation, produces many of the radioactive sources that are used in medical, academic, and industrial applications (including oil exploration).

Because of their exceptional ability to penetrate other materials, neutrons can travel great distances in air and require very thick hydrogen-containing materials (such as concrete or water) to block them. Fortunately, however, neutron radiation primarily occurs inside a nuclear reactor, where many feet of water provide effective shielding.

A radioactive atom emits an alpha particle or a beta particle and with each radiation it emits an electromagnetic wave known as a gamma wave. An alpha particle is an ionised He atom having a charge + 2, beta particle is an electron and gamma is an EM wave. So the only particle in the question which a radioactive atom cannot emit spontaneously is a neutron.

Neutron is correct answer because in fission we get average 2.5 neutrons. And radioactivity is something else. As gamma rays are neutral similarly neutron.

But the difference is in their mass. A neutron is many time heavy than alpha beta and gamma so it can interact with matters and makes more effective results than gamma.

Neutrons are not emitted by the radio active substance, but alpha, beta and gamma are emitted by radio active substance, just please explain me any other use of radio active substance, then why neutrons are not emitted by the radio active substance, why? any reason, if you know please explain me about that, thank you.

Neutrons are a bi-product of fission. It's how Nuclear Reactors work and they are the essential element in a chain reaction, the control rods absorb emitted neutrons to prevent a runaway cascade. So Neutrons are emitted by radioactive elements - the phrasing of the question makes the answer all of the above.

To put it more simply, Alpha rays emit +ve charge and beta rays emit -ve charge and lastly, gamma rays emit electromagnetic radiations. We may have studied neutrons in nuclear fission but it is platonically a by product and not the actual product.

As from redioactive material alpha beta gamma rays are emitted, here alpha and beta particle holds +ve, -ve charge respectively same case with gamma rays these are neutral as neutron having no charge. what are the dissmilarities between both??

Option D correct.

If neutrons are emitting in a spontaneos fission process, that is not radioactive process. And as far radoiactive particales are three, alpa, beta, gamma. Neutrons not including this.

Neutron reside in the nucleus of the atom and it is heavy than other elementary particles hence it is imposssible to have a emission of neutron.

Neutrons can also be emitted like spontaneous fission of heavy element. Cf 252 emits fission neutron. Answer should be All