Isotopes in biology
The Phenomenon of natural radioactivity was accidentally discovered by the french scientist henry becquerel. When he found that crystals of potassium uranyl sulphate spontaneously emitted a radiation which could blacken photographic plate. Subsequently other naturally radioactive elements like radium, thorium and radon were discovered.
the word isotope is derived from the greek, soody in 198 who first established the existence of atoms of the same element different atomic molecular weight and called them isotopes.
the stability of an isotope of a given element is dictated by the ratio of neutrons to protons in the nucleus. The relationship between the number of protons and neutrons in a nucleus can be seen by plotting the values of N against Z for known isotopes.
The stability of elements higher atomic numbers is as usually associated with a neutron to proton ratio. The first discovered natural radioactive elements were among the heaviest element.
|Isotopes in biology