Hi Guys this is Ayush and you are at Engraver Beats and today gonna talk about Radioactivity. Is really radioactivity harmful,how many types of radioactivity are there and there properties So LETS GET STARTED
=> Radioactivity is the nuclear phenomenon of spontaneous emission of alpha,beta,gamma radiations from the nuclei of atoms during there decay. Henry Becquerel discovered the phenomenon of radioactivity in 1896 .At starting these rays were known as Becquerel rays .
The substances which disintegrate by the spontaneous emission of radiations are called the radioactive substances.e.g. uranium,radium.polonium,actinium etc.
The symbol of radioactivity is in below image wherever there is this type of sign do not go there
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What is Radioactivity ?
The substances which disintegrate by the spontaneous emission of radiations are called the radioactive substances.e.g. uranium,radium.polonium,actinium etc.
The symbol of radioactivity is in below image wherever there is this type of sign do not go there
There are basically three types of radiations alpha,beta,gamma and gamma is the most harmful among three so lets know in deep
Alpha Particles
Alpha particles consist of two protons and two neutrons.It is same as a doubly ionised helium atom i.e., a helium nucleus containing two protons and two neutrons.It is represented as He++.The mass of alpha particles is four times the mass of protons i.e., 6.68 * 10^-27 kg and it has positive charge of +3.2*10^-19 c and its specific charge is 4.79*10^7 c kg^-1 .The speed of alpha particles is 10^7 m/s. Alpha particles strongly ionises the gas through which it passes. AS alpha particles are positively charge they are deflected by magnetic and electric fields. It also affect the photographic plate and cause fluorescence material on striking the fluorescent material. These destroy the living cell and cause biological damage . Alpha particles can be stopped from thin micca foils
Beta Particles
Beta particles are fats moving electrons and its mass is 9.1*10^-31 kg. Its charge is -1.6*10^-19 c and specific charge is 1.76*10-11 c/kg.
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