Periodic Discussions Jun 16, 2009
That method allowed us to authenticate elements up to an atomic number of around 107 or 108. But elements even heavier than that fall apart too quickly to allow the chemists to do their work. (Slate)
New Chemical Element In The Periodic Table Jun 16, 2009
Its so-called atomic number 112, hence the provisional name element 112 , is the sum of the atomic numbers of the two initial elements: zinc has the atomic number 30 and lead the atomic number 82. An element s atomic number indicates the number of protons in its nucleus ... Since 1981, GSI accelerator experiments have yielded the discovery of six chemical elements, which carry the atomic numbers 107 to 112. (Science Daily)
Teaching Science with a Box Feb 11, 2009
Facts: Symbol: C, Atomic Number: 6, Atomic Weight: 12. 0107, Periodic Table Group: 14, Classification: Non-metallic, Color: Graphite is black and diamond is clear, Melting Point: 3800 [or 3527. (Suite101.com)
The Production of Heavy Elements Mar 23, 2008
Still, however, this process only accounts for a certain number of heavier elements generally speaking, those elements lighter than iron (atomic number 26). Earth, however, is made up of elements even as heavy as Uranium (atomic number 92), the heaviest naturally occurring element, which is far too complex to be created in a simple star. (Suite101.com)
The Beginnings of Nuclear Physics Feb 29, 2008
Madame Curie showed that several different compounds could be shown to be radioactive, but that they all seemed to have the element Uranium (atomic number 92) in common. She later found that Thorium (atomic number 90) was also radioactive. (Suite101.com)
The Discovery of the Neutron Feb 28, 2008
This would help to keep the atom neutral, and to fix some disparity found between the atomic number of an atom and its atomic mass (for the atomic number is defined by the number of protons, where the atomic mass, which measures the mass of the nucleus, was generally higher) ... The overall charges remained the same, and now there no longer seemed to be a discrepancy between the atomic mass and the atomic number. (Suite101.com)
Cerium Rare Earth Element Feb 20, 2008
Its atomic number is 58, meaning it has 58 protons in its nucleus and 58 electrons surrounding the nucleus in different energy levels. The two outermost electrons are in the first f-shell energy level, and these are the electrons which determine many of its properties. (Suite101.com)
Check your home for Radon, a dangerous radioactive gas Jan 30, 2008
More definitively, Radon is a gaseous radioactive element having the symbol Rn, the atomic number 86, an atomic weight of 222, a melting point of -71C, a boiling point of -62C, and (depending on the source, there are between 20 and 25 isotopes of radon 20 cited in the chemical summary, 25 listed in the table of isotopes); it is an extremely toxic, colorless gas; it can be condensed to a transparent liquid and to an opaque, glowing solid; it is derived from the radioactive decay of radium and... (Rio Rancho Observer, NM)
IBM set to pay $300 million for secret storage startup, says report Jan 3, 2008
The company's name is the roman number 14, which is the atomic number of silicon in the periodic table. Related articles. (EETimes)
Even Mascots Must Be Politically Correct Dec 11, 2007
It goes nicely with the creative choice of uniform number for the little porker, 26, which is the atomic number for iron. And, I've officially done an internet search and found no hint of the word ferrous being used in a derogatory way toward any group of people. (Philadelphia, TheInsiders.com)
GREGG ELLIS: 'Seven in 2007' a good rallying cry, but no sure thing Nov 20, 2007
- The atomic number for nitrogen is seven. - After creating the earth, God rested on the seventh day. (Northeast Mississippi Daily Journal)
This Little Piggy Needs A Name Nov 15, 2007
The number 26 is the atomic number for iron (Fe) on the Periodic Table. That's some pretty quick thinking. (Philadelphia, TheInsiders.com)
NIST atom interferometry displays new quantum tricks May 26, 2007
Preparing and probing atomic number states with an atom interferometer. Physical Review Letters 98, 200405 (2007). (EurekAlert!)
You say aluminum, I say aluminium May 12, 2007
Before we start praising the utility of the light yet sturdy element with the symbol Al and the atomic number 13, let's dither about what to call it. If British scientist Sir Humphrey Davy had prevailed in 1807, we'd all be calling it alumium. (Globe and Mail -- Business)
Sinking feeling on way to Hollywood May 5, 2007
We went into a huddle to find out, from which Yogi emerged, triumphant: "Rare earths are a moderately abundant group of 15 metallic elements known as the lanthanide series (atomic numbers 57 through to 71) plus yttrium (38). "Although scandium (atomic number 21) is not a rare earth element, it is commonly included with the lanthanides because of its similar properties. " The world was suddenly that little bit clearer. Thursday We bought Lynas - how could we resist? - and put Perilya and Troy on... (Sydney Morning Herald -- Business)
Feb. 23, 1941: One Step Closer Feb 24, 2007
The team's success in producing an element with an atomic number higher than that of uranium (92) meant that the production of a nuclear weapon was not only possible, but inevitable ... The chemical identification of what would be known as plutonium and assigned the atomic number 94 came on the night of Feb. 23, 1941. (Wired News)
New Process For Making Much-sought Iron Nanospheres Feb 22, 2007
-- Iron is a chemical element with the symbol Fe and atomic number 26. Iron is a group 8 and period 4 metal. (Science Daily)
Steering atoms toward better navigation, physicists test Newton and Einstein along the way Feb 18, 2007
It employs isotopes-atoms of a chemical element with the same atomic number and nearly identical chemical behavior but with different atomic masses. Two different isotopes of rubidium are cooled to ultralow temperature and released into free fall. (EurekAlert!)
Physicists Set 'Speed Limit' For Future Superconducting Magnet Feb 13, 2007
A research team led by a Northwestern University physicist has identified a high-temperature superconductor -- Bi-2212, a compound containing bismuth -- as a material that might be suitable for the new wires needed to one day build the most powerful superconducting magnet in the world, a 30 Tesla magnet. The material currently used in magnetic resonance (MR) imaging machines in both hospitals and research laboratories -- a low-temperature superconducting alloy of the metallic element niobium --... (Science Daily)
In Russia's Science City, elemental discoveries Feb 12, 2007
Itkis, a nuclear physicist himself, knows the atomic number of every element in Dmitri Mendeleev's famous table and has a text on "exotic nuclei" on his bookshelf. Technically, the new elements weren't discovered so much as created. (SunSpot.net)
Controlling Electrical Properties Of Organic Semiconductor Materials Feb 4, 2007
-- Indium is a chemical element in the periodic table that has the symbol In and atomic number 49. This rare, soft, malleable and easily fusible poor metal, is chemically similar to aluminium or gallium. (Science Daily)
Nanostructured Material Offers Environmentally Safe Armor-piercing Capability, May Replace Depleted Uranium Feb 3, 2007
Armor-piercing projectiles made of depleted uranium have caused concern among soldiers storing and using them. Now, scientists at the U.S. Department of Energy s Ames Laboratory are close to developing a new composite with an internal structure resembling fudge-ripple ice cream that is actually comprised of environmentally safe materials to do the job even better. (Science Daily)
Chaos On A Chip Feb 1, 2007
-- Krypton is a chemical element with the symbol Kr and atomic number 36. A colorless, odorless, tasteless noble gas, krypton occurs in trace amounts in the atmosphere, is isolated by fractionating. (Science Daily)
Researchers Achieve Major Breakthrough In Laser Diode Development Feb 1, 2007
A team of researchers at the University of California, Santa Barbara led by Shuji Nakamura, winner of the 2006 Millennium Technology Prize, has reported a major breakthrough in laser diode development. The photograph shows the far-field pattern of the world's first gallium nitride (GaN) nonpolar blue-violet laser diodes. (Science Daily)
Green Detergents Clean Up As Environmentally Friendly Consumer Products Jan 31, 2007
-- Phosphorus is the chemical element in the periodic table that has the symbol P and atomic number 15. Phosphorus is commonly found in inorganic phosphate rocks and in all living cells. (Science Daily)
Transistor Technology Breakthrough Represents Biggest Change To Computer Chips In 40 Years Jan 30, 2007
-- Germanium is a chemical element in the periodic table that has the symbol Ge and atomic number 32. This is a lustrous, hard, silver-white, metalloid that is chemically similar to tin. (Science Daily)
Magnetic, Luminescent Nanoparticles Set New Standard Jan 27, 2007
-- The lanthanide series comprises the 15 elements from lanthanum to lutetium on the periodic table, with atomic numbers 57 through 71 ... -- Cerium is a chemical element in the periodic table that has the symbol Ce and atomic number. (Science Daily)
NIST 'Standard Bullet' Fights Gang Violence Jan 23, 2007
-- Lead is a chemical element in the periodic table that has the symbol Pb and atomic number 82. Lead has a dull luster and is a dense, ductile, very soft, highly malleable, bluish-white metal that has. (Science Daily)
Scientists Discover Way To Order Polar Molecules In Crystals Jan 23, 2007
-- Bismuth is a chemical element in the periodic table that has the symbol Bi and atomic number 83. This heavy, brittle, white crystalline trivalent poor metal has a pink tinge and chemically resembles. (Science Daily)
Scientists Stabilize Platinum Electrocatalysts For Use In Fuel Cells Jan 13, 2007
-- Platinum is a chemical element in the periodic table that has the symbol Pt and atomic number 78. A heavy, malleable, ductile, precious, grey-white transition metal, platinum is resistant to. (Science Daily)
Radiation Degrades Nuclear Waste-containing Materials Faster Than Expected Jan 12, 2007
-- Bismuth is a chemical element in the periodic table that has the symbol Bi and atomic number 83 ... -- Thallium is the chemical element in the periodic table that has the symbol Tl and atomic number 81 ... -- Radon is a chemical element in the periodic table that has the symbol Rn and atomic number 86. (Science Daily)
A New Family Of Lead-Free Optical Glasses Jan 9, 2007
-- Thallium is the chemical element in the periodic table that has the symbol Tl and atomic number 81 ... -- Lanthanum is a chemical element in the periodic table that has the symbol La and atomic number. (Science Daily)
PO for polonium Jan 7, 2007
Until recently, polonium was a little-known metalloid going by the symbol Po on the periodic table of elements and the atomic number 84. That all changed in late 2006, when the substance was ;ngered as a possible murder weapon in the. (Boston Globe -- World)
Nanoscale Cubes And Spheres: Uniform Porous Silicon Oxide Nano-objects Formed By Controlled Disassembly Of A Lattice Structure Jan 5, 2007
-- Silicon is the chemical element in the periodic table that has the symbol Si and atomic number 14. A tetravalent metalloid, silicon is less reactive than its chemical analog carbon. (Science Daily)
Could Improved Wheats Reduce Magnesium Deficiencies? Jan 4, 2007
-- Magnesium is the chemical element in the periodic table that has the symbol Mg and atomic number 12 and an atomic mass of 24. 31. (Science Daily)
