Nuclear energy power station & nuclear medicine imaging
Nuclear energy is used to produce electricity and also in medicine imaging to identify the defects of a patient(NMR spectroscopy)
The atom is almost all empty space. If we had an atom and wished to see the nucleus, we would have to magnify it until the atom was the size of a large room, and then the nucleus would be a large speck which you could just make out with your eye. The radius of the nucleus is 1,00,000 times smaller than the atom and in terms of volume, atom is a thousand million million times bigger than nucleus.
But nearly all the weight of the atom is in the infinitesimal nucleus. As neutrons and protons in nucleus are very nearly of the same mass as each other and each is about 2000 times as massive as an electron, the total number of protons and neutrons in the nucleus determines all but a small fraction of the mass of an atom.
The energy of the nucleus reveals itself in many ways; nuclear warheads that can destroy cities, submarines driven by nuclear reactors, nuclear power plants and in destroying cancerous cells. Nuclear energy comes from the conversion of mass and can result from nuclear reactions like fission (the splitting of the nucleus) and fusion (the coming together of nuclei).
In case of nuclear fission, nucleus splits into two roughly equal fragments and two or three more neutrons. The sum of these masses is less than that of the original nucleus, and the difference in mass is converted into energy of the motion of fragments which can lead to a nuclear chain reaction in certain conditions. The energy released as a result of nuclear chain reaction is used to run commercial nuclear reactors and generate electricity.
Nuclear medicine is a branch of medicine that uses the nuclear properties of matter in diagnosis and therapy. Nuclear medicine is a safe, painless and cost–effective technique to image the body and treat disease. In diagnosis, radioactive substances are administered to patients and the radiation emitted is measured. In therapy, radio nuclides are administered to treat disease or provide palliative pain relief. Nuclear medicine imaging procedures often identify abnormalities very early in the progress of a disease ‐ long before many medical problems are apparent with other diagnostic tests.