isotope

Definitions

Examples

• The minerals in the water contain trace amounts of uranium, which gradually decays into different uranium isotopes and eventually into a completely different element, thorium.

• The thousands of meteorites in NASA collections can be divided into two main classes, based on their isotopes—the relative amounts of the same elements with different numbers of neutrons.

• The isotopes in the Bom Jesus tusks revealed that these elephants lived in a mix of forests and savannas.

• The researchers gave the critters a cocktail of chemicals labeled with isotopes, forms of elements having different masses.

• Next, the researchers used the oxygen isotopes in the peat to track the waxing and waning of the region’s sea ice over thousands of years.

• Deuterium is an isotope of hydrogen containing a proton and neutron in its nucleus, while normal hydrogen has only a proton.

• After eight years, traces of the isotope are expected to be extremely low.

• The next step was to test whether Arafat had actually ingested or inhaled a quantity of the suspect isotope.

• One of the isotopes of fission products, when fuel melts, is an iodine isotope, and it goes in your body through your thyroid.

• All we've been able to find is some strange isotope but we don't know how to reproduce it or synthesize it.

• Well, heavy water is made of one atom of oxygen plus two atoms of deuterium, which is the first isotope of hydrogen.

• Why nail the "power metal" down to an isotope of gold with an atomic weight of 197?

• There must be another one in either wing, for the isotope plant and the cartridge-case plant.

• An isotope is just a different variety of the ordinary kind of atom in each element.