Isotope dating information
Isotopes are distinguished from each other by giving the combined number of protons and neutrons in the nucleus.For example, uranium 235 is the isotope of uranium that has 235 protons and neutrons in its nucleus rather than the more commonly occurring 238. noun A nearly identical person; near double: Like his isotope Paglia, Rush Limbaugh can be counted on to bury the occasional nugget of truth beneath his avalanche of infuriating extrapolation and phony statistics/It actually IS you.
A method for determining the age of an object based on the concentration of a particular radioactive isotope contained within it.He was employed at Caltech's Division of Geological & Planetary Sciences at the time of writing the first edition.He is presently employed in the Space & Atmospheric Sciences Group at the Los Alamos National Laboratory.In some cases radiation can be used to treat diseased organs, or tumours.Five Nobel Laureates have been closely involved with the use of radioactive tracers in medicine.The attributes of naturally decaying atoms, known as radioisotopes, give rise to several applications across many aspects of modern day life (see also information paper on The Many Uses of Nuclear Technology).
There is widespread awareness of the use of radiation and radioisotopes in medicine, particularly for diagnosis (identification) and therapy (treatment) of various medical conditions.
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. 1979, 1986 © Harper Collins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Cite This Source (ī'sə-tōp') One of two or more atoms that have the same atomic number (the same number of protons) but a different number of neutrons.
Carbon 12, the most common form of carbon, has six protons and six neutrons, whereas carbon 14 has six protons and eight neutrons.
It has become increasingly clear that these radiometric dating techniques agree with each other and as a whole, present a coherent picture in which the Earth was created a very long time ago.
Further evidence comes from the complete agreement between radiometric dates and other dating methods such as counting tree rings or glacier ice core layers.
The amount of the isotope in the object is compared to the amount of the isotope's decay products.