decay by alpha emission

Alpha decay is the phenomenon of emission of an a - particle from radioactive nucleus...

Emission of a and b -rays bring some changes in the nucleus of the atom and the new element formed as a result of these charges is called daughter elemen..

- particle and forms an inert gas radon The transformation is given by Both the mass (226 - 4 = 222) and the charge (88 - 2 = 86) must be conserved. Radon is unstable and also decays with the emission of an α - particle: Radium emits γ - rays ..

A phenomenon of emission of an electron from a radioactive nucleus...

A radioactive nucleus or element emits an alpha or a beta particle and gets converted into a new nucleus or elemen..

The emission of a or b - particles from a radioactive element results in the function of new element called daughter element. If the daughter element still has unstable nucleus, it further disintegrates by emitting a or b - particle and produces a new daughter element. This process of suc..

The spontaneous breaking up of the nucleus is known as radioactive disintegration or radioactive decay. Radioactive disintegration is found to obey the following two laws: i) Atoms of all radioactive elements are undergoing spontaneous disintegration i.e., are constantly breaking to form ..

When a nucleus emits an a - particle its atomic number isreduced by two units and its mass number is reduced by four units. The daughter element, thus formed occupies a position in the periodic table two places left of the parent element. For e.g., the emission of a - particle from produc..

When certain metals are heated to a high temperature, they emit thermions (electrons) and the phenomenon is called thermionic emission Cathode rays are a stream of negatively charged particles emitted from the cathode of an evacuated bulb, when a voltage of nearly 3000 volts given across ..

Radioactivity Spontaneous emission of active rays by certain unstable elements. Three types of radiations are: (i) Alpha particles He 2 + ion (Helium nuclei). (ii) Beta - rays - consist of electrons. (iii) Gamma - rays - High energy electromagnetic rays. Emissio..