Uses and application of radiation in radioactive dating
While the number of protons is the same, the number of neutrons in the nucleus differs.
History has forgotten the landlady, but George de Hevesy went on to win the Nobel prize in 1943 and the Atoms for Peace award in 1959.New kinds of sorghum, garlic, wheat, bananas, beans and peppers are more resistant to pests and more adaptable to harsh climatic conditions.In Mali, irradiation of sorghum and rice seeds has produced more productive and marketable varieties.Isotopes are different forms of an atom of the same chemical element.They have identical chemical properties but different relative atomic masses.Fertilisers 'labelled' with a particular isotope, such as nitrogen-15 and phosphorus-32 provide a means of finding out how much is taken up by the plant and how much is lost, allowing better management of fertiliser application.
Using N-15 also enables assessment of how much nitrogen is fixed from the air by soil and by root bacteria in legumes.
The first power station to produce electricity by using heat from the splitting of uranium atoms began operating in the 1950s.
Today most people are aware of the important contribution nuclear energy makes in cleanly providing a significant proportion of the world's electricity.
George de Hevesy The first practical application of a radioisotope was made by George de Hevesy in 1911.
At the time de Hevesy was a young Hungarian student working in Manchester with naturally radioactive materials.
It is the radioactive nature of these unstable atoms, usually referred to as 'radioisotopes', which gives them so many applications in modern science and technology.