GermanGerman Wikipedia has an article on: AtomNounAtom n. (genitive Atoms, plural Atome) Derived terms
Related termsFrom Wiktionary under the GNU Free Documentation License. The atom is a basic unit of matter consisting of a dense, central nucleus surrounded by a cloud of negatively charged electrons. The atomic nucleus contains a mix of positively charged protons and electrically neutral neutrons (except in the case of hydrogen-1, which is the only stable nuclide with no neutron). The electrons of an atom are bound to the nucleus by the electromagnetic force. Likewise, a group of atoms can remain bound to each other, forming a molecule. An atom containing an equal number of protons and electrons is electrically neutral, otherwise it has a positive or negative charge and is an ion. An atom is classified according to the number of protons and neutrons in its nucleus: the number of protons determines the chemical element, and the number of neutrons determine the isotope of the element. The name atom comes from the Greek ἄτομος/átomos, α-τεμνω, which means uncuttable, something that cannot be divided further. The concept of an atom as an indivisible component of matter was first proposed by early Indian and Greek philosophers. In the 17th and 18th centuries, chemists provided a physical basis for this idea by showing that certain substances could not be further broken down by chemical methods. During the late 19th and early 20th centuries, physicists discovered subatomic components and structure inside the atom, thereby demonstrating that the 'atom' was divisible. The principles of quantum mechanics were used to successfully model the atom. Relative to everyday experience, atoms are minuscule objects with proportionately tiny masses. Atoms can only be observed individually using special instruments such as the scanning tunneling microscope. Over 99.9% of an atom's mass is concentrated in the nucleus, with protons and neutrons having roughly equal mass. Each element has at least one isotope with unstable nuclei that can undergo radioactive decay. This can result in a transmutation that changes the number of protons or neutrons in a nucleus. Electrons that are bound to atoms possess a set of stable energy levels, or orbitals, and can undergo transitions between them by absorbing or emitting photons that match the energy differences between the levels. The electrons determine the chemical properties of an element, and strongly influence an atom's magnetic properties. From Wikipedia under the
GNU Free Documentation License How is a neutral metal atom converted to a positively charged iron? Q. How is a neutral metal atom converted to a positively charged iron? Please and thank you!! Asked by withme-- - Mon Mar 10 13:12:03 2008 - - 1 Answers - 0 Comments A. An electron is stripped away from the atom. this results in one more proton than electron and gives atom a positive charge. Electron could be stripped away if it was alone on its valence shell and hence atom would have easier time getting rid of electron than absorbing more to fill up shell. examples are sodium and potassium Answered by Shaz - Mon Mar 10 13:21:03 2008 What is the average kinetic energy per atom of helium gas at a temperature of 23 C? Q. What is the root-mean-square speed of a helium atom in the preceding question? Asked by Troy/Sarah J - Fri Nov 7 12:14:46 2008 - - 2 Answers - 0 Comments A. R = universal gas constant = 8.314511 J/(mole-degK) kB = Boltzmann's constant = R/Avogadro = 1.380657E-23 J/(molecule-degK) M = molar mass of He = 0.004003 kg/mol ==> m = 6.647137E-27 kg/molecule At 23 C = 296.15 K, Mean KE = 3(kB)T/2 = 6.133223E-21 J vRMS = sqrt(3RT/M) = sqrt(2KE/m) = 1358.445 m/s Answered by kirchwey - Fri Nov 7 15:15:47 2008 What is the number of bonded pairs around the central atom of?
Q. what is the number of bonded pairs around the central atom of these molecules? what is the number of nonbonded pairs around the central atom of these molecules? what is the electron geometry? molecular geometry? polarity? and, are there any reasonce? CBr4 SO2 C2Br4 H2S PH3 please help me! 10 pts! Asked by paulo t - Tue Mar 11 12:50:21 2008 - - 1 Answers - 0 Comments A. CBr4: 4 bonded pairs, 0 nonbonded electron geometry: AX4 molecular geometry: tetrahedral nonpolar vibrational and rotational resonance SO2 4 bonded pairs, 0 nonbonded pair electron geometry: AX2E1 Bent/Angular molecular geometry: Bent/Angular nonpolar vibrational resonance C2Br4 4 bonded, 0 non bonded electron geometry: AX2E1 molecular geometry: Bent/Angular nonpolar vibrational, rotational resonance H2S 2 bonded, 2 nonbonded molecular geometry: Bent/Angular electron geometry: AX2E1 polar vibrational and rotational resonance PH3 3 bonded, 1 non bonded molecular geometry: trigonal bipyramid electron geometry: AX3E1 nonpolar vibrational and rotational resonance Answered by sunshinegirl - Tue Mar 11 13:02:08 2008 From Yahoo Answer Search: "Atom" See also:
 news.google.com UberGizmo ... just like any other decent entry-level computer does these days. Something tells us an Atom -powered FUTRO S100 might do much better in the market... Via Eden powered Fujitsu FUTRO S100. ITvoir Fujitsu's FUTRO S100 Slippery Brick VIA Eden One Watt Processor Brings Power-Efficiency to Fujitsu ... Computerworld Australia all 8 news articles » news.google.com Tom's Hardware Guide Netbook Italia revealed specs for the upcoming Samsung N510 netbook, which will have an 11.6-inch screen, Atom N280 1.66 GHz, 1 GB RAM and of course, ... Would you rather have a super smartphone or a new Netbook? CNET News Nvidia Ion Based Samsung N510 Techtree.com NVIDIA's Ion Gains Traction OS News TrustedReviews - CrunchGear - CNET News all 33 news articles » news.google.com Electronista Processing power comes from a 1.6GHz Atom N270 CPU and there is 1GB of RAM along with a 160GB hard drive. The preloaded operating system is not specified, ... GB 12.1-inch X1200 Atom -based laptop TechGadgets.in GB X1200 12.1-inch N270 ultraportable SlashGear Posts tagged with gb-x1200 UberGizmo all 6 news articles » From Google News Search: "Atom"  education.jlab.org 428px x 640px | 18.80kB [source page] configuration table an atom of nitrogen contains two electrons in its first energy level and five electrons in its second energy level A Bohr model of a nitrogen atom could look like this In the Bohr model a nitrogen atom has a central nucleus composed of seven protons and seven neutrons surrounded by seven electrons Two of the electrons are in the first energy level while  teslatech.info 440px x 520px | 12.40kB [source page] Enlarged Diagram of the Spring Atom As shown by Larry Spring s Ceramic Disc Magnet Demonstration From Yahoo Image Search: "Atom"  dominicfallows.co.uk Dominic hu, 23 Jul 2009 17:52:32 GM Looks like the kids in Taiwan will be able to take everyone's favorite Ion-based nettop for a spin sometime soon. Except, instead of being known as the Acer.  dealspl.us unknown hu, 23 Jul 2009 18:49:39 GM Find and share the best prices, discounts and reviews on 2.2-lb. MSI Wind . Atom. 1.6GHz 10 LED-backlit Netbook at dell_business - DealsPlus.  dvice.com Addy Dugdale Wed, 22 Jul 2009 10:09:36 GM Dare of the day: Rollerblader goes rollercoaster, by Addy Dugdale, for DVICE. From Google Blog Search: "Atom" |
RFC 4287: The Atom Syndication Format
Atom Wiki
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