Picometre

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Image:Atom.png
A Helium atom,
having a radius of 31 picometres.

A picometre (American spelling: picometer, symbol pm) is a unit of length in the metric system, equal to one millionth-millionth of a metre, which is the current SI base unit of length. It can be written in scientific notation as 1×10−12 m (engineering notation) or 1 E-12 m (exponential notation) — both meaning 1 m / 1,000,000,000,000.

femtometre <<< picometre <<< nanometre <<< micrometre <<< millimetre < centimetre < decimetre < metre < decametre < hectometre < kilometre

It equals a millionth of a micrometre (formerly called a micron), and was formerly called micromicron or bicron.
It equals a hundredth of an Ångström, an internationally recognized non-SI unit of length.

See also

ca:Picòmeter et:Pikomeetereo:Pikometro eu:Pikometro it:Picometro nl:Picometer ja:ピコメートル no:Picometer nn:Pikometer sk:Pikometer sl:Pikometer sr:Пикометар th:พิโกเมตร

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Some of the initial content on this page may be incorporated in part from copyleft sources in the public domain including wikis such as Wikipedia and AskDrWiki. Drug information for patients came from the The National Library of Medicine. Infectious disease information may have come from the Centers for Disease Control (CDC). Differential Diagnoses are drawn from clinicians as well as an amalgamation of 3 sources: 1.The Disease Database; 2. Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:3; 3. Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:7 .

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