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The re-entry permit in Japan also exists in the form of a stamp, known as 再入国許可 (Japan Re-entry Permit), which is affixed to a foreign passport or other travel document and serves as a re-entry visa. Foreign nationals planning to travel outside Japan for more than one year are required to obtain a re-entry permit.
Carbon compounds. Carbon compounds are defined as chemical substances containing carbon. [ 1][ 2] More compounds of carbon exist than any other chemical element except for hydrogen. Organic carbon compounds are far more numerous than inorganic carbon compounds. In general bonds of carbon with other elements are covalent bonds.
676-97-1 CH 3 Cl 2 OPS: methylthiophosphorylchloride: 18281-76-0 CH 3 Cl 2 O 2 P: methyl dichlorophosphate: 677-24-7 CH 3 Cl 2 P: methyldichlorophosphine: 676-83-5 CH 3 Cl 2 PS: methylphosphonothioic dichloride: 676-98-2 CH 3 Cl 3 Ge: methylgermanium trichloride: 993-10-2 CH 3 D: deuteriomethane 1: 676-49-3 CH 3 F: methyl fluoride: 593-53-3 CH ...
A carbon–carbon bondis a covalent bondbetween two carbonatoms.[1] The most common form is the single bond: a bond composed of two electrons, one from each of the two atoms. The carbon–carbon single bond is a sigma bondand is formed between one hybridized orbital from each of the carbon atoms. In ethane, the orbitals are sp3 ...
Carbon fibre reinforced carbon [n 1] ( CFRC [4] ), carbon–carbon ( C/C [2] ), or reinforced carbon–carbon ( RCC) is a composite material consisting of carbon fiber reinforcement in a matrix of graphite. It was developed for the reentry vehicles of intercontinental ballistic missiles, and is most widely known as the material for the nose ...
Carbon. Carbon (from Latin carbo 'coal') is a chemical element; it has symbol C and atomic number 6. It is nonmetallic and tetravalent —meaning that its atoms are able to form up to four covalent bonds due to its valence shell exhibiting 4 electrons. It belongs to group 14 of the periodic table. [ 16]
Category. v. t. e. Dissolved organic carbon ( DOC) is the fraction of organic carbon operationally defined as that which can pass through a filter with a pore size typically between 0.22 and 0.7 micrometers. [ 2] The fraction remaining on the filter is called particulate organic carbon (POC). [ 3] Dissolved organic matter (DOM) is a closely ...
Graphite, named by Abraham Gottlob Werner in 1789, from the Greek γράφειν ( graphein, "to draw/write", for its use in pencils) is one of the most common allotropes of carbon. Unlike diamond, graphite is an electrical conductor. Thus, it can be used in, for instance, electrical arc lamp electrodes.