radioactivity materials

Fallouts from Nuclear power generation plants and nuclear bomb..

Radioactive elements are those, which emit invisible radiations of their own accord. This is called radioactivity. Some typical examples of radioactive elements are uranium, thorium, plutonium, polonium etc. Radiations emitted by radioactive elements consist..

Waste products from nuclear power stations etc. are becoming a serious problem. They should be put where the radiation can do no harm. Unfortunately, there is no way of stopping a radioactive nucleus from emitting radiation. Nuclear energy has some advantages over fossil fuel such as coal..

The products of the disintegration of radium atoms. Half-life Radioactive decay is a random process and different radioactive substances decay at different rates. The time taken for the number of particles emitted per unit time to drop to half of its original value is known as t..

The radioactive material was kept in a small cavity in a block of lead. The whole apparatus was enclosed in an evacuated vessel as shown here. An electric field was applied. It was observed that the beam is split up into three components. The radiations, which eme..

10. - Determine the half life of a radioactive material if its activity falls ..

. Such series demonstrate as to how various forms of life have changed gradually over a period of millions of years. As a result, the evolution of a number of animals such as horse, camel and elephant, has been clearly understood. Plenty of fossil evidence is now available so as to establish human ..

The sewer removed from the sewerage during cleaning is often left on the roadside. This poses several health hazards to the public. Some of these wastes are also classified as hazardous wastes. Hazardous wastes are those that are potentially dangerous and can cause diseases, fire, etc. The hazar..

>When a nucleus emits radiation it is said to decay. Rays from radioactive isotopes are dangerous to living things but are also useful in variety of ways. Exposure to large amounts of radiation is harmful to health. All radioactive materials should always be handled wi..

Scientists theorize that the earth began as a waterless mass of rock surrounded by a cloud of gas. Radioactive materials in the rock and increasing pressure in the earth's interior gradually produced enough heat to melt the interior of the earth. The heavy materials su..