Double bond - Wikipedia
https://en.wikipedia.org/wiki/Double_bond
A double bond in chemistry is a chemical bond between two chemical elements involving four bonding electrons instead of the usual two. The most common double bond, that is between two carbon atoms, can be found in alkenes. Many types of double bonds exist between two different elements.Carbon–carbon bond - Wikipedia
https://en.wikipedia.org/wiki/Carbon–carbon_bond
Carbon atoms can also form double bonds in compounds called alkenes or triple bonds in compounds called alkynes. A double bond is formed with an sp2-hybridized orbital and a p-orbital that isn't involved in the hybridization. A triple bond is formed with an sp-hybridized orbital and two p-orbitals from each atom.Alkene - Wikipedia
https://en.wikipedia.org/wiki/Alkene
In organic chemistry, an alkene is an unsaturated hydrocarbon that contains at least one carbon–carbon double bond. The words alkene and olefin are often ...
Double bond - Wikipedia
Wisconsin Sikh temple shooting - Wikipedia
https://en.wikipedia.org/wiki/Wisconsin_Sikh_temple_shooting
On August 5, 2012, a massacre took place at the gurdwara (Sikh temple) in Oak Creek, Wisconsin, where 40-year-old Wade Michael Page fatally shot six peopleGunman Kills 6 at Sikh Temple in Wisconsin - The New York Times
www.nytimes.com/2012/08/06/us/shooting-reported-at-temple-in-wisconsin.html
Aug 5, 2012 - Family members waited for information outside the Sikh temple in Oak Creek, Wis
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