Chemical substance identity of benzene, until the correct structure was described by Friedrich August Kekulé. Likewise, the idea of stereoisomerism – that atoms have rigid three-dimensional structure and can thus form isomers that differ only in their three-dimensional arrangement – was another crucial step in understanding the concept of distinct chemical substances. For example, tartaric acid has three distinct isomers, a pair of diastereomers with one diastereomer forming two enantiomers. An element is a chemical substance made up of a particular kind of atom and hence cannot be broken down or transformed by a chemical reaction into a different element, though it
Ibis GS-730 Super Magic a gross weight of , giving a useful load of . With maximum full fuel of the payload for pilot, passenger and baggage is . The standard day, sea level, no wind, take off is and the landing roll is . Ibis GS-730 Super Magic The Ibis GS-730 Super Magic is a Colombian STOL homebuilt aircraft that was designed and produced by Ibis Aircraft of Cali, introduced in 2007. When it was available the aircraft was supplied as a complete ready-to-fly-aircraft or as a kit for amateur construction. Production has been completed and as of 2011 the aircraft was no