Isotope

used for deep time isotopes. As the calcite within the hard shell of a brachiopod precipitates out of the surrounding seawater, trace elements are recorded within the shell, indicative of information detailing the surrounding water. Most species of brachiopod shells are composed of a low-magnesium calcite, one of the most stable forms of skeletal carbonate; much less prone to diagenesis than other species. These shells are then…

the most common two out of the nine isotopes that Helium has. Isotopes are two or more forms of the same element. An isotope contains equal numbers of protons but have a different number of neutrons in their nuclei. Hence, isotopes differ in relative atomic mass but not in chemical properties; in particular, a radioactive form of an element. Many elements only have one stable element. The main isotope of Helium is 3He. 3He (He-3) is a light, non-reactive isotope. It has two protons and one…

of three isotopes: Skittles, M&M’s, and Sweet Tarts, and the ratio of Sweet Tarts to Skittles is 27:18. The relative number of M&M’s and the atomic mass were determined by weighing each of the different Isotopes and calculating their average masses for further calculations. Calculations The following calculations were used to determine the atomic weight of Kandimonium: Kandimonium Jar #10 Total Mass: 80.0916 g Average Mass of Isotope T (Sweet Tarts): 1.156 g Average Mass of Isotope S…

It wasn't until March 1940, John R. Dunning and his colleagues at Columbia University had demonstrated conclusively that uranium-235 was the isotope that fissioned with slow neutrons, not the more abundant uranium-238 as Fermi had guessed. This finding was important, because it meant that a chain reaction using uranium-235 was possible, but only if the isotope could be separated from the uranium-238 and concentrated into a critical mass. Considering that uranium-235 and uranium-238 are…

Radioisotopes are atoms that consist of unstable combination of neutrons and protons. All elements which have their atomic numbers greater than 83 are radioisotopes and have unstable, radioactive nuclei. They have at least one stable isotope and one unstable isotope. In order to gain stable conformation the nucleus of the atoms loses a neutron due to which radiation energy is given off and the atom is said to be in radioactive state. They are also called as radionuclides because they have more…

“Later this year that Isotopes were dropped by the Los Angeles Dodgers who they had had ties with for over 47 years” (Schoenfeld, 2014). The Isotopes were dropped because the Los Angeles Dodgers Triple-A affiliation as moved to Oklahoma City. “After the socially acceptable period of time the Isotopes were picked up the Colorado Rockies and is now their Triple-A affiliation” ("Dodgers to break ties with Isotopes", 2014, p. 1). Now the Topes are affiliated with a very…

estimation of running speed from trace fossils as well as comparisons of fossil biomass to modern day analogues. A more accurate and unambiguous method of predicting the body temperatures of dinosaurs is through the application of clumped isotope thermometry. Clumped isotope thermometry involves the use of heavy,…

The ringed seal is a key sentinel species for mercury (Hg) contamination in Arctic marine ecosystems. The total mercury concentrations in Arctic ringed seals’ muscle were determined using a cold vapor atomic fluorescence spectroscopy (CVAFS) instrument. The total mercury concentrations in high ice cover years (2003, 2004 and 2005) were significantly higher than the low ice cover years (2011 and 2012). This suggests that the change in ice-cover significantly changes the total mercury…

several methods for separating the more uncommon isotopes of hydrogen, carbon, oxygen, sulfur, and nitrogen. This allowed the isotopes to be used in laboratory research. After this Urey wrote several papers on his methods of the separation of isotopes. Then at the start of World War II Urey was asked to assist the U.S government’s program to separate the uranium isotope^235 from the isotope of uranium^238 which is more abundant than the uranium isotope^235. This would be used in the atomic…

The creature that is being examined in this experiment is the now extinct Spinosaurus aegyptiacus, a dinosaur that lived in Northwestern Africa about 95 million years ago. The Spinosaurus (fig.1) was a creature that has been estimated to be anywhere from 13 to 18 meters (43 to 60) long, weighed 7 to 9 tonnes (8-10 tons), and is agreed to be by most paleontologists the largest carnivorous dinosaur of all time. It is thought to be a piscivore, although the Spinosaurus’ diet and lifestyle is very…