Alpha hydrogens in an ester. Alpha hydrogens in an alkyl bromide. 1  Related terms: Î²-carbon, beta-carbon, primary hydrogen, secondary hydrogen, tertiary hydrogen, Î²-hydrogen, beta-hydrogen, Î²-elimination, Î±-helix, Î²-sheet.lpha hydrogens in an ester. Alpha hydrogens in an alkyl bromide. 1  Related terms: Î²-carbon, beta-carbon, primary hydrogen, secondary hydrogen, tertiary hydrogen, Î²-hydrogen, beta-hydrogen, Î²-elimination, Î±-helix, Î²-sheet.
September 14, 1989 The Standard Gravure shooting occurred on  September 14, 1989, in Louisville, Kentucky, when Joseph T. Wesbecker, a 47-year-old pressman, killed eight people and injured twelve at his former workplace, Standard Gravure, before committing suicide.
Las Vegas shooting. A gunman opened fire on the crowd at a music festival Oct. 1, 2017, killing at least 58 in the deadliest mass shooting in modern U.S. history