Essays Tagged: "chemical properties"
Gallium
ely match those predicted by Mendelev.Gallium, atomic number 31, is very similar to aluminum in its chemicalproperties. It does not dissolve in nitric acid because of the protective film ofgallium oxi ... le isotopes: gallium-69 ( 60.4 percent )and gallium-71 (39.6 percent ).Somewhat similar to aluminum chemically, gallium slowly oxidizes in moist airuntil a protective film forms, and it becomes passiv ...
Subjects: Science Essays > Chemistry
Chlorine
The Element: ChlorineGeneral InformationWe researched the chemical element known as chlorine. Chlorine has an atomic number of 17 and an atomic weight of 35.4 ... orming a pale yellowish green solution. Chlorine is so reactive that it never occurs free in nature.Chemical PropertiesChlorine is in the halogen family, and like all the other halogen elements chlori ... re of industrial growth. In, 1975 chlorine productions ranked seventh on the list of largest-volume chemicals produced in the United States. The importance of chlorine has changed as new uses have bee ...
Subjects: Science Essays > Chemistry
Biology paper on Russia's risk.
ras. These labratories, which were once used for producing highly dangerous biological weapons. The chemical properties of already deadly viruses were altered to create even more dangerous viruses tha ...
Subjects: Science Essays > Biotechnology
Cystic Fibrosis
colon and other organs involved in the digestive process). Cystic fibrosis involves changes in the chemical properties of mucus, causing thicker-than-normal mucus that can lead to obstructions in the ...
Subjects: Humanities Essays > Health & Medicine > Diseases
What is radioactivity?
in turn, composed of quarks.IsotopesAll atoms with nuclei having the same number of protons form a chemical element. Having the same number of protons, they have the same number of electrons, hence t ...
Subjects: Science Essays > Chemistry
'Cliff profiles are created by many complex factors'-Discuss
erosional processes take a long time and are very complex. Lithology describes the mechanical and chemical properties of rocks. Rocks are a major factor that affects the profile of a cliff. Weatheri ...
Subjects: Science Essays > Earth Sciences > Geography
Atomic structure
ough, we have to clarify this statement. An atom cannot be broken down further without changing the chemical nature of the substance. For example, if you have 1 ton, 1 gram or 1 atom of oxygen, all of ... e can break down the atom of oxygen into smaller particles, however, when we do the atom looses its chemical properties. For example, if you have 100 watches, or one watch, they all behave like watche ...
Subjects: Science Essays > Chemistry
Radium. This essay describes, gives a history of, and gives properties of the element radium.
n, which is a process used to separate components from a mixture through differences in physical or chemical properties. In 1902, after refining several tons of pitchblende from North Bohemia, one-ten ... Brian. Uranium and Other Radioactive Elements. Danbury, CT: Atlantic EuropeCo., 1997.Newton, David. Chemical Elements. Detroit: U*X*L, 1999.Radium. Jan. 2001. Wikipedia. 1 Dec. 2004."Radium." The New ...
Subjects: Science Essays > Chemistry
Periodic Table.
tomic radii, ionization energy, and electronegativity. A Family is a group of elements with similar chemical properties, a vertical column in the periodic table of elements. A period is a sequence of ...
Subjects: Science Essays > Chemistry
Isotopes in Society: Xenon
iffers by the number of neutrons. Thus, they vary in physical properties, but all have very similar chemical properties, and electronic structure. The relative atomic mass of an element is configured ...
Subjects: Science Essays > Earth Sciences
The Periodic Table of Elements
The periodic table of elements is a method of displaying the chemical elements in a table. It was first devised in 1869 by the Russian chemist Dmitri Mendeleev. ... because new elements are being discovered and new theoretical models have been developed to explain chemical behavior. Various different layouts are possible, however, the most common forms are still ... an extremely useful framework to classify, systematize and compare all the many different forms of chemical behavior. Earlier attempts to list the elements had usually put them in order of atomic mas ...
Subjects: Science Essays > Chemistry
Alkanes & Alkenes
erties:The chemistry of carbon compounds is called organic chemistry. There are millions of organic chemicals, but they can be divided into groups called homologous series. All members of a particular ... divided into groups called homologous series. All members of a particular series will have similar chemical properties and can be represented by a general formula.The alkane series is the simplest ho ...
Subjects: Science Essays > Chemistry
Ecology Levels Of Biological Organization
hese three subatomic particles make up an atom. An atom is the smallest unit of matter that has the chemical properties of a particular chemical element. In turn, elements are made up of atoms. One of ... the small building blocks from which larger molecules are made. Molecules are two or more elements chemically combined and a compound is two or more different elements chemically combined. Some of th ...
Subjects: Science Essays > Biology
The Obliteration Of The Rainforests
inds of rare and endangered species of insects, animals, and a variety of tropical plants that have chemical properties to help cure a multitude of diseases. Unfortunately, the rainforests are being d ... ere are at least 2,000 plants in the rainforests that have been identified as having anti-cancerous chemical properties. (Rainforest Resources/Facts 1) However, as the rainforest disappears, "so do ma ...
Subjects: Science Essays > Biology