Radio-active-(of such metals as radium or uranium) having atoms that break up, and in so doing,sent out rays in the form of electrically charged particles capable of penetrating(going deep into) opaque(not allowing light to pass through)bodies and of producing electrical effects.
Radio-active dust-(for example,as carried by winds) from explosion of nuclear bombs,etc.
Fission-splitting or division(for example,of one cell into new cells,of the nucleus or central parts of certain atoms,for example,uranium when an atom bomb is exploded.)
The twenthieth century has witnessed the development and use of atomic or nuclear energy for destructive and powerful purposes on a vast scale.Now,when we afraid of atomic wars which can cause unthinkable destruction,we feel the satisfaction of enjoying comforts given by cheap electricity by nuclear reactors and ships run on atomic energy,and many more besides.
When the nucleus(central part) of the atom is broken up,tremendous energy is produced.Radioactive elements like uranium have a large number of protons, and they give out radiations(energy in rays,energy or heat waves). These elements are used for producing nuclear energy.The nuclei of these elements are bombarded with high-speed particles,and this results in nuclear fission(splitting or division). This conversion of a small amount of radioactive substance into a very great amount of nuclear energy is the basis of the explosion of an atomic bomb.
The horrors of the hydrogen bomb explosion are even more frightening.It is a thermonuclear bomb,"thermo" meaning "of heat". At its center is no doubt an atomic bomb,which is exploded at the start.This explosion activates the surrounding hydrogen radioactive atoms.An extremely hot zone is created in which nearly all of the matter present burns or changes into vapor or gas at extremely high pressure.The shock waves,then, traveling from the bomb cause destruction in the air,under water,or underground.
In addition to the atomic or nuclear radiations given out by the hydrogen bomb,its burning and melting effects are simply indescribable.Further developments of the hydrogen bomb lead us to the neutron and cobalt bombs based on the same radioactive principles.
No country can win a large-scale nuclear war with another nuclear power as both will get destroyed in the process.Besides,the countries affected by the radioactive fallout,even not participating(taking part) in the war will suffer unnecessary destruction.
Surely,it is in the interest of all humanity to end all nuclear preparations.We should destroy the stockpiles of nuclear weapons everywhere through mutual agreement(consent).
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