To bring closely together the parts or particles of; to contract; to compress; to bring together in folds or plaits, as a garment; also, to draw together, as a piece of cloth by a thread; to pucker; to plait; as, to gather a ruffle. verb (v. t.) To derive, or deduce, as ...
A 1976 NASA mission sent an atomic clock 10,000 kilometres into space, confirming the Einstein General Theory of Relativity prediction that gravity slows the flow of time, the report states. Now, "Gravity Probe B aims to measure a weaker and even stranger effect called 'frame dragging', a ...
The use of atoms, molecules and molecular-scale structures to enhance existing technology and develop new materials and devices. The goal of this technology is to manipulate atomic and molecular particles to create devices that are thousands of times smaller and faster than those of the current mic...
kryptonnoun(n.) An inert gaseous element of the argon group, occurring in air to the extent of about one volume in a million. It was discovered by Ramsay and Travers in 1898. Liquefying point, -- 152¡ C.; symbol, Kr; atomic weight, 83.0. ...
The number of the element is its atomic number, which is the number of protons in each atom of that element. The element symbol is a one- or two-letter abbreviation of the element's name. Sometimes it refers to an old name. (For instance, K is for kalium.) ...
The Periodic Table and Compound Names and Formulas The Periodic Table can be a very useful tool. The elements are arranged according to increasing atomic number (number of protons). The elements are also grouped so that elements with similar properties are in the same portion of the table.T...
In 1922, he won the Nobel prize for Physics. He developed the "Bohr theory of the atom and liquid model of the atomic nucleus". Nicholas Copernicus His theorized that the Sun was the fixed point around which the motions of the planets takes place. The Earth rotates around its axis once ...
GroundState 1.givesoffenergygained 2.producescolors 3.Example:Neonsigns D.AtomicEmissionSpectra 1.Setoffrequenciesemittedbytheelement 2.Uniquetoeachelement Ex.Strontium–Red Hydrogen–Pink 3.Knownasaline-emissionspectrumHydrogenlineemissionspectrumV.Bohr’sModel&AtomicEmissionSpectrum A.Bohrproposedthat...
RD Deslattes,HF Beyer,F Folkmann - 《Journal of Physics B Atomic & Molecular Physics》 被引量: 61发表: 1999年 Allergens, sources, particles, and molecules: Why do we make IgE responses? Allergens are foreign proteins or glycoproteins that are the target of IgE antibody responses in humans....
Atomic weight 10.9. Symbol B. caldron noun (n.) A large kettle or boiler of copper, brass, or iron. [Written also cauldron.] catoptron noun (n.) A reflecting optical glass or instrument; a mirror. catopron noun (n.) See Catopter. chaldron noun (n.) An English dry measure, ...