Essays Tagged: "Isotope"

Radioactivity and waste disposal

radioactivity in Canada relate not to the fission, but to the decay of radioactive materials - radioisotopes. These are unstable atoms that emit energy for a period of time that varies with the isotop ... pH to neutrality, or slight alkalinity results in increased sorption by the formation rock of radioisotopes present in the form of free cations. The incorporation of such cations causes a pronounced ...

(7 pages) 115 0 3.5 Dec/1991

Subjects: Science Essays > Chemistry

Iron- about its elemental properties and history of the metal.

relatively average number of energy levels. The following is a list of the half-life for different isotopes. As it shows on the list it has extremely stable nuclei.Isotope Half LifeFe-52 8.3 hoursFe- ...

(3 pages) 30 0 5.0 Feb/2004

Subjects: Science Essays > Earth Sciences > Geology & Geosciences

What is radioactivity?

when a radiation is emitted by radioactivity.Protons and neutrons are, in turn, composed of quarks.IsotopesAll atoms with nuclei having the same number of protons form a chemical element. Having the ... hence the same chemical properties. When they have different numbers of neutrons, they are called "isotopes". Each isotope of a given element is designated by the total number of its nucleons, i.e. p ...

(1 pages) 40 2 4.3 Jun/2004

Subjects: Science Essays > Chemistry

Chemistry 10 Notes on Atomic Structure and Half Life.

Sometimes omitted (implied by symbol) Old Way of writing it 32-S = 32S Isotope Atom that has different # of neutrons Still same Element Different Form ... lement Different Forms of the same element Atomic Mass = Average of all the different isotopes in nature 1 atom always had a whole # of neutrons Example: In nature, ...

(1 pages) 16 0 0.0 Sep/2004

Subjects: Science Essays > Chemistry

Sodium24 analysis

to go up aswell but im having trouble uploading any of my original essays.1 & 2.Sodium-24 is an isotope used in medicine and the mining industry, as it is a gamma emitter. It is used for studies o ... her 149.6 hours or 6.23 days to become 'safe,' as 10 half-lives is what is required for an unstable isotope to become 'safe'4.Sodium-24 is used to measure extracellular fluid by indicator dilution and ...

(2 pages) 12 0 0.0 Jun/2005

Subjects: Science Essays > Chemistry

Nuclear Power.

y. In the atomic model, when an element's neutron is more than its proton, it is called an unstable isotope. Unstable isotopes lose or gain neutrons and protons to gain stability, the loss of particle ... bility, the loss of particles and energy is radioactivity.Radioactive decay occurs when an unstable isotope breaks down into another same or different element. This decay process continues until stabl ...

(2 pages) 37 0 3.4 Dec/2005

Subjects: Science Essays > Physics

Isotopes in Society: Xenon

An isotope is an atom which is related to an element by the number of protons in the nucleus, and diffe ... al properties, and electronic structure. The relative atomic mass of an element is configured using isotopes. It is the average atomic mass of all the element's isotopes. Therefore, if one isotope amo ... Therefore, if one isotope among all the others has an atomic mass which is not similar to the other isotopes, it could create a great change in the atomic mass of an element.Every element which has be ...

(4 pages) 29 0 4.2 Mar/2006

Subjects: Science Essays > Earth Sciences

Study notes for Chemistry test. Basic definitions and notes on group structure and chemical bonding. For year 10 these achieved a level 6+ or an A+ (The spaces are for atomic drawings).

reside in the nucleus with protons and have a neutral charge.The number of Neutrons determines the isotope of the atom.An isotope is an atom with the same amount of protons in its nucleus but a diffe ...

(4 pages) 42 2 4.4 Apr/2006

Subjects: Science Essays > Chemistry

The Decaying Of Radioactive Isotopes

Not all of the atoms of a radioisotope decay at the same time, but they decay at a rate that is characteristic to the isotope. The ... istic to the isotope. The rate of decay is a fixed rate called a half-life. The half-life of a radioisotope describes how long it takes for half of the atoms in a given mass to decay. Some isotopes de ... atomic nucleus resulting in the release of energy and matter from the nucleus. Remember that a radioisotope has unstable nuclei that does not have enough binding energy to hold the nucleus together. R ...

(1 pages) 20 1 0.0 May/2006

Subjects: Science Essays > Chemistry

Chemestry Notes: - development of periodic table, organization of elements, atomic structure, and modern periodic table, isotopes, summary of chapter

therefore also the number of electrons normally surrounding the nucleus.Atomic Mass: the mass of an isotope of an element measured in units formerly based on the mass of one hydrogen atom taken as a u ... or on 1/16 the mass of one oxygen atom, but after 1961 based on 1/12 the mass of the carbon-12 atom.Isotope: either of two or more forms of a chemical element with the same atomic number but different ...

(3 pages) 18 0 0.0 Oct/2006

Subjects: Science Essays > Chemistry

“Primordial Deuterium And The Big Bang”

the already popular Big-Bang Theory on the birth of the universe.Deuterium is a particularly heavy isotope that was only created within the first few minutes of the universe. According to the Big Ban ...

(3 pages) 530 0 3.0 Nov/2001

Subjects: Science Essays > Physics

The separation process of uranium from the compound uranium hexafluoride

sts one atom of uranium combined with six atoms of fluorine. Natural uranium is 99.284% Uranium 238-isotope, with Uranium 235-isotope only constituting about 0.711% of its weight. However for uranium ... 0.711% of its weight. However for uranium to be used as a nuclear fuel, the proportion of the U-235 isotope has to be much high. In order to increase the proportion, natural uranium or "yellowcake" mu ...

(3 pages) 1051 0 0.0 Jun/2008

Subjects: Science Essays > Chemistry

Cat's Cradle Book review

earch, he found out that one of the fathers of the atomic bomb Felix Hoenikker, actually created an isotope of water named ice-nine. And this is the thing that ended John’s world by freeze all th ...

(4 pages) 1338 0 3.0 Mar/2009

Subjects: Literature Research Papers

9 year old boy with testosterone disorder

Most dialysis assays use small tracer amounts of radiolabeled testosterone added to the serum. This isotope is measured with the percentage multiplied by the total testosterone to calculate the free t ...

(5 pages) 1990 0 0.0 May/2009

Subjects: Science Essays > Biology