Essays Tagged: "Chemical element"

Chlorine Debate, How White Do You Want it?

Chlorine is one of the world's most widely used chemicals, the buildingelement vital to almost every United States industry. We use chlorine andchlo ... ith manganese dioxide. In 1810, the English chemistSir Humphrey Davy determined that chlorine was a chemical element and named itfrom the Greek word meaning greenish-yellow. One hundred and eighty-fiv ... rganochlorines threaten people and so should be banned. 'Industry producesmore than 11,000 chlorine chemicals, each of which could take years of study, 'explains Jack Weinburg, a spokesperson for Gree ...

(5 pages) 66 0 3.5 Feb/1994

Subjects: Science Essays > Chemistry

The Chemical Element Florine

THE CHEMICAL ELEMENT FLUORINEFluorine is the thirteenth most abundant element and compounds containing f ... lcium Fluoride) and made a little fluoride through an electrolytic1. His apparatus blew up due to a chemical reaction between the fluorine and hydrogen. It was finally isolated in 1886 by Ferdinand Fr ... cing isotopically fractionated uranium (UF6) which is used in making atomic bombs.*Commercial fluorochemicals including many heat-resistant plastics.*Fluorochloro hydrocarbons are used extensively in ...

(3 pages) 47 0 4.0 Aug/2002

Subjects: Science Essays


Downs, A. J., The Chemistry of Chlorine, Bromine, Iodine and Astatine (1975); Hamilton, E. I., The Chemical Elements and Man (1978); Nechamkin, Howard, Chemistry of the Elements (1968); Ruben, Samuel ... ements (1968); Ruben, Samuel, Handbook of the Elements, 2d ed. (1967; repr. 1985); Trifonov, D. N., Chemical Elements: How They Were Discovered (1985).

(2 pages) 66 0 4.3 Sep/1996

Subjects: Science Essays > Chemistry


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 ...

(5 pages) 71 0 3.0 Nov/1996

Subjects: Science Essays > Chemistry

The Classification and Formation of Crystals

eometric characteristics of crystals is called crystallography. When the conditions are right, each chemical element and compound can crystallize in a definite and characteristic form.Thirty-two class ...

(2 pages) 41 0 3.0 Jan/1997

Subjects: Science Essays > Chemistry

Glenn Seaborg

Glenn Seaborg was an American chemist and was known for his discovery of new chemical elements. He was born in Ishpeming, Michigan and went to the University of California. He w ... it was discovered. In 1997 the International Union of Pure and Applied Chemistry announced that the chemical element with atomic number 106 would be given the name seaborgium (Sg) in his honor.

(1 pages) 25 0 3.0 Mar/2003

Subjects: Science Essays > Chemistry

Basic Facts About Iron.

ch small concentrations in other rocks, however, that it cannot be used economically for mining.The chemical element iron is the fourth most common element in the Earth's crust and the second most abu ... iron is the fourth most common element in the Earth's crust and the second most abundant metal. Its chemical symbol, Fe, is taken from the Latin word ferrum.Metal is chemically active and is found in ...

(3 pages) 43 0 3.0 Nov/2003

Subjects: Science Essays > Environmental Science


a meter, or about 1/25,400,000 inch. Atoms form the building blocks of the simplest substances, the chemical elements. That is why they are considered the basic building blocks of matter. The elements ...

(1 pages) 47 1 3.4 Apr/2004

Subjects: Science Essays > Chemistry

The History of the Periodic Table

the pioneers who started the concept of organizing elements in a table based on their physical and chemical properties. Scientists back then suggested that an element is something can not be longer b ... eriod table in eighteen-seventy after he completed it two years before. He Mendeleyev predicted the chemical and physical properties of missing elements based on the trends of the periodic table. He b ...

(2 pages) 61 1 4.8 Jun/2004

Subjects: Science Essays > Chemistry

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 ...

(1 pages) 40 2 4.3 Jun/2004

Subjects: Science Essays > Chemistry

The Atom

arged particles. It also is the smallest unit of matter that has the characteristic properties of a chemical element. As such, the atom is the basic building block of chemistry.John Dalton -John Dalto ... n's original atomic theory are now known to be incorrect. But the core concepts of the theory (that chemical reactions can be explained by the union and separation of atoms and that these atoms have d ...

(4 pages) 46 1 5.0 Jul/2004

Subjects: Science Essays

The Building Blocks of Biology

r. Be sure to explain how this bond works.In science, a molecule is the smallest particle of a pure chemical substance that still retains its chemical composition and properties. A molecule consists o ... n and properties. A molecule consists of two or more atoms joined by shared pairs of electrons in a chemical bond. It may consist of atoms of the same chemical element, as with oxygen (O 2), or of dif ...

(2 pages) 16 0 3.0 Apr/2005

Subjects: Science Essays > Biology

Human iodine consumption: effects of iodine deficiency and measures taken in response.

his and many other factors must be taken into consideration during iodine fortification.Iodine is a chemical element, it is common in the forms of (I-) iodide, (IO3-) iodate and (I2) iodine, it is add ...

(5 pages) 38 3 4.0 Oct/2005

Subjects: Humanities Essays > Health & Medicine

The Decaying Of Radioactive Isotopes

r naturally or by artificial means.A radioisotope is a natural or artificially created Isotope of a chemical element having an unstable nucleus that decays, emitting alpha, beta, or gamma rays until s ... it was thought that these materials were all members of the actinide series; however, exacting radiochemical research has demonstrated that certain of the light elements also have naturally occurring ...

(1 pages) 20 1 0.0 May/2006

Subjects: Science Essays > Chemistry

Element Properties Lab - Chemistry 11

Purpose: The purpose of this lab is to classify elements according to their properties.Materials: MagnetVarious ElementsVolt MeterPen or PencilPaper ... sVolt MeterPen or PencilPaperSafety GogglesPrediction: I predict that I will be able to find out if elements conduct electricity or are magnetic.Procedure:1. Draw a data table using the following head ... ing the following headings: Element, Symbol, Properties.2. Put on safety goggles.3. Take one of the elements4. Record the name and symbol of the element in your chart.5. Using the volt meter, test the ...

(2 pages) 8 0 0.0 Sep/2006

Subjects: Science Essays > Chemistry

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

t 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 numbers of neutrons.Mass number: the numb ... d neutrons in the nucleus of an atom of a particular substance.Radioisotope: a particular form of a chemical element (isotope) that is radioactiveSpecific compounds we make are useful not because of w ...

(3 pages) 18 0 0.0 Oct/2006

Subjects: Science Essays > Chemistry

Carbon Family

the ancients, and its discoverer is unknown. Carbon is used for steel and filters. (Bentor, Yinon. Chemical Elements. com-Carbon.) Silicon, meaning "flint", is the second most abundant chemi ... on Berzelius discovered silicon in 1823. It is used for glass and semi- conductors. (Bentor, Yinon. Chemical Germanium, like silicon, is used in semi-conductors. Unlike ...

(2 pages) 3175 0 0.0 Apr/2001

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 ...

(2 pages) 5 0 0.0 Jun/2001

Subjects: Science Essays > Biology

Alternative Fuels

aterial or substance, other than petroleum. Some alternative fuels are biodiesel, ethanol, butanol, chemically stored electricity, hydrogen, methane, natural gas, wood, and vegetable oil. I think that ... in water is a fairly common solvent. Purified ethanol contains no more than 1% water.Hydrogen is a chemical element in the periodic table that has a symbol of H and atomic number 1. Hydrogen has an a ...

(2 pages) 37 0 0.0 Oct/2007

Subjects: Science Essays > Chemistry

L.A.T - Patterns of Reactivity

How to find out if a metal is silver?Silver is a chemical element with the symbol "Ag". A soft, white, shiny transition metal, it has the highest ele ... opper can be found by adding it to lead nitrate. By adding copper to lead nitrate, there will be no chemical reaction taking place because copper is below lead in the reactivity series.Copper + Lead N ...

(1 pages) 12 0 0.0 Nov/2008

Subjects: Science Essays > Chemistry