Ångström

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Ångström

The ångström (Swedish: [ˈɔŋstrøm]) or angstrom is a unit of length equal to 10−10m (1 ten-billionth of a meter) or 0.1 nanometers(nm).

Its symbol is Å, a letter in the Swedish alphabet.

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The natural sciences and technology often use ångström to express sizes of atoms, molecules, microscopic biological structures, and lengths of chemical bonds, arrangement of atoms in crystals, wavelengths of electromagnetic radiation(light), and also dimensions of integrated circuit parts.

Atoms of phosphorus, sulfur, and chlorine are about an angstrom in covalent radius, while a hydrogen atom is about half an angstrom.

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The ångström is named after the Swedish physicist Anders Jonas Ångström (1814–1874).

The symbol is always written with a ring or circle diacritic ^[5], as the letter in the Swedish alphabet.

The unit's name is often written in English without the diacritics, but the official definitions contain diacritics.

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Videos & Exhibits:

References

[1]

Citation Linkywqaugeunhowzrcj.public.blob.vercel-storage.comRelative Sizes in Ångströms, log scaling used.Unedited source: http://sphweb.bumc.bu.edu/otlt/MPH-Modules/PH/PH709_BasicCellBiology/PH709_BasicCellBIology8.html

Jun 29, 2016, 4:21 PM

[2]

Citation Linkyoutube.comYouTube Video, "How Do I Convert Angstroms to Micrometers?: Math Conversions & Calculations", by eHowEducation, ~ 1 minute, introductory video on converting Angstroms to Micrometers.

Jun 29, 2016, 4:13 PM

[3]

Citation Linkbiology-online.orgBiology Online, "Ångström" defined: A unit of length equal to 0.1 nanometer or 1×10−10 meters, mainly used for expressing sizes of atoms, lengths of chemical bonds, and wavelengths of electromagnetic radiation.In 1868, Anders Jonas Ångström created a spectrum chart of solar radiation where he expressed the wavelength of visible-light spectra in multiples of one ten-millionth of a millimeter (or 0.000,000,1 mm).This unit became known as Ångström unit.However, the nanometer is now more often used as a unit of length while Ångström is no longer as popular as it used to be.

Jun 29, 2016, 3:51 PM

[4]

Citation Linkwww.library.yale.eduYale Library, "Diacritics and special characters by language": Diacritics: Finnish - circle above (angstrom): a; umlaut: a, o

Aug 5, 2016, 2:25 AM

[5]

Citation Linkphysicsweb.phy.uic.eduPhysics web - Univ. of Illinois at Chicago, "Basic Physical Scales Relevant to Cells and Molecules": Angstrom (1 Angstrom = 10 -10 m = 0.1 nanometer).Atoms are roughly Angstroms in size (a hydrogen atom is about 1 A in diameter, a carbon atom is about 2 A in diameter).

Aug 5, 2016, 2:20 AM

[6]

Citation Linkdictionary.comDictionary, diacritic def.: also called diacritical mark.a mark, point, or sign added-attached to a letter or character to distinguish it from a similar form, to give it a particular phonetic value, to indicate stress, etc., as a cedilla, tilde, circumflex, or macron.E.g.Swedish and Norse words may also use the circle marking above certain vowels (å), and Czechoslovakian words may use the hac&ek a wedge-shaped symbol to indicate a "ch" sound as in English chill.

Jun 29, 2016, 4:00 PM

[7]

Citation Linkdictionary.comDictionary, angstrom definition: a unit of length, equal to one tenth of a millimicron, or one ten millionth of a millimeter, primarily used to express electromagnetic wavelengths.Symbol: Å;

Aug 5, 2016, 2:16 AM

[9]

Citation Linkwww.youtube.comYouTube Video, "How Do I Convert Angstroms to Micrometers?: Math Conversions & Calculations", by eHowEducation, ~ 1 minute, introductory video on converting Angstroms to Micrometers.

Jun 29, 2016, 4:13 PM