chemical element


  • WordNet 3.6
    • n chemical element any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter
    • ***


In literature:

In the chemical laboratory of the ship were all the elements of creative force and life known to man.
"Omega, the Man" by Lowell Howard Morrow
They are also dependent upon the chemical elements in the soil and air.
"The Heart of Nature" by Francis Younghusband
It may be rather likened to a chemical fusion, in which both elements are present, but each of them is affected by the composition.
"The Philosophy of the Conditioned" by H. L. Mansel
The most important element in coal is the carbon (known chemically by the symbol C).
"How it Works" by Archibald Williams
It is one of the chemical elements; that is, it is a separate and distinct substance.
"The Automobile Storage Battery" by O. A. Witte
Chemically separate certain natural elements and they rush together with a thunder-clap.
"Melomaniacs" by James Huneker
This is a regular chemical test for certain elements when they are combined with oxygen.
"Common Science" by Carleton W. Washburne
Animal and human excrements are particularly rich in the chemical elements that are fittest for the reproduction of human food.
"Woman under socialism" by August Bebel
The simple chemical elements, and 3.
"Landmarks of Scientific Socialism" by Friedrich Engels
But no chemical element not found on the earth has ever been discovered in a meteor.
"A Text-Book of Astronomy" by George C. Comstock
By the help of this criterion Lavoisier composed the first table of chemical elements similar to our modern ones.
"Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3" by Various
His "Elements of Chemical Philosophy" was now published, and dedicated to Lady Davy.
"Famous Men of Science" by Sarah K. Bolton
The plant feeds on primary chemical elements; or, to state it more correctly, the plant is nothing but transformed primary elements!
"Popular Books on Natural Science" by Aaron David Bernstein
The same subtle influences went to make both: the same elements, the same forces, the same chemical processes.
"Atlantic Classics, Second Series" by Henry C. Merwin
Men, considered politically, do not behave like mathematical factors nor like chemical elements.
"Behind the Mirrors" by Clinton W. Gilbert
More than one-third of all the known chemical elements have been found by analysis in meteorites, but not any new ones.
"Astronomy" by David Todd
The softness of the wool is also much influenced by the chemical elements of the soil.
"Sheep, Swine, and Poultry" by Robert Jennings
The chemical element is as much a manysided system as the organic cell or the whole vegetable kingdom.
"The Positive Outcome of Philosophy" by Joseph Dietzgen
Chemical elements in body, 383.
"Foods and Household Management" by Helen Kinne
Then you'll probably find small quantities of all the chemical elements from twenty-five down in that heap of ashes.
"The Onslaught from Rigel" by Fletcher Pratt

In news:

New chemical element discovered in Japan.
New Test Method for Standard Test Method for Gypsum Board Suspected of Emitting Chemical Compounds or Elements Capable of Reacting with Copper.
Downloadable pdf of Chapter 1 Definitions of Concepts and Description of the Elemental Analysis of Organic Compounds from A Chemical Study of Oils and Fats of Animal Origin.
Chemical Elements Are All the Rage.
Like chemical elements, nanoparticles of distinct types combine in definite proportions.
When it reopened in 1945, the twelve-year-old Oliver Sacks discovered there the periodic table of the chemical elements.
The Weather- Tite seal has a three-blade Nitrile wiper seal to lock out the elements and corrosion-causing chemicals.
Chemical analysis of this new element, recently named seaborgium, seemed out of the question.
Each element emits energy at some characteristic wavelengths as it decays , providing insight into the chemical composition of the supernova ejecta — the shells of material flung out by the exploding star.
A Culligan reverse osmosis drinking water system uses a series of filters to reduce many microscopic impurities and chemical elements that may be in your water.
This book gives each element a personality based on the element's chemical properties.
At refineries , nitrogen oxide combines with volatile organic chemicals in sunlight to create ozone, an element in smog.
Chemical elements are the fundamental building blocks of nature, and while most of them—carbon, copper, iron, neon, etc.—were born within stars, scientists like nuclear chemist Ken Moody are struggling to create new ones in the lab.
Uranium ( ) is a silvery-white metallic chemical element in the actinide series of the periodic table, with atomic number 92.

In science:

Previous observations (Jura & York 1978; Harris & Bromage 1984; Jenkins et al. 1986) focused on the unique chemical property that, of the abundant elements, only the dominant ion of Cl, Cl+ , has exothermic reactions with H2 , and equally important, they occur on nearly every collision.
Revisiting the Chlorine Abundance in Diffuse Interstellar Clouds from Measurements with the Copernicus Satellite
This paper revisits the origin of dust in galaxies, in particular, in the Milky Way, by using a chemical evolution model of a galaxy composed of stars, intestellar medium, metals (elements heavier than helium), and dust.
The origin of dust in galaxies revisited: the mechanism determining dust content
These works are based on the evolutionary model of elemental abundance in galaxies called chemical evolution model (Tinsley 1980 for a review) and add some (or all) of the three processes of formation, destruction, and growth of dust to it.
The origin of dust in galaxies revisited: the mechanism determining dust content
The radioactive elements” published in the Journal of Chemical Education .
Discovery of the actinium, thorium, protactinium, and uranium isotopes
For a strictly homogenous populations such as open and globular clusters the degree of chemical homogeneity is quite high and which is about 0.05 dex (De Silva et al. 2006, Pancino et al. 2010) for a number of elements.
Chemical compositions of stars in two stellar streams from the Galactic thick disk
Therefore, the chemical signatures or tags in the form of [X/Fe] for those key elements from the ma jor processes of nucleosynthesis may test some proposed origins for the streams.
Chemical compositions of stars in two stellar streams from the Galactic thick disk
The relative abundance of chemical elements in the observable Universe represents the most stringent proof on the processes of generating and destroying atomic nuclei.
The problem of evolution is also connected with the origin of the chemical elements and with possible variation with time of fundamental physical constants.
There are two methods to measure the age of the Universe T0 : (i) determination of the age of the oldest stars in a galaxy and (ii) determination of the age of the chemical elements.
In any case, unless for this last measurement, the abundances of the elements that we observe today, are affected by chemical evolution of the galaxies.
The light elements abundances estimations are affected by the chemical evolution of the galaxy (sec.
D/H abundance of 2 ×10−4 to the present ISM value without overproducing heavy elements and remaining within the other observational constraints typically imposed on such models. 3He remains a challenge to models of chemical and stellar evolution.
Primordial Nucleosynthesis
In nature only states containing the same amount of the chemical elements can be transformed into each other.
The Physics and Mathematics of the Second Law of Thermodynamics
Hence F (Γ, Γ′ ) = +∞ for many pairs of state spaces, in particular, for those that contain different amounts of some chemical element.
The Physics and Mathematics of the Second Law of Thermodynamics
In our world, where there are 92 chemical elements (or, strictly speaking, a somewhat larger number, N , since one should count different isotopes as different elements), and this leaves us with at least 92 free constants that specify the entropy of one mole of each of the chemical elements in some specific state.
The Physics and Mathematics of the Second Law of Thermodynamics