Octet (Stravinsky) — Stravinsky in 1921 The Octet for wind instruments is a chamber music composition by Igor Stravinsky, completed in 1923. Stravinsky’s Octet is scored for an unusual combination of woodwind and brass instruments: flute, clarinet in B … Wikipedia
Octet (Beethoven) — The Octet in E flat major by Ludwig van Beethoven, Op. 103, is a work for two oboes, two clarinets, two bassoons, and two horns. Despite its high opus number, it was written in 1792/1793, during Beethoven s early period. Beethoven reworked and… … Wikipedia
chemical bonding — ▪ chemistry Introduction any of the interactions that account for the association of atoms into molecules, ions, crystals, and other stable species that make up the familiar substances of the everyday world. When atoms approach one another … Universalium
Steric number — The steric number of a molecule is the number of atoms bonded to the central atom of a molecule plus the number of lone pairs on the central atom. It is often used in VSEPR theory (valence shell electron pair repulsion theory) in order to… … Wikipedia
Chamber music — For other uses, see Chamber music (disambiguation). Frederick the Great plays a flute concert in his summer palace Sanssouci; painting by Adolph Menzel Chamber music is a form o … Wikipedia
Melos Ensemble — The Melos Ensemble is a group of musicians who started in 1950 in London to play chamber music in mixed instrumentation of string instruments, wind instruments and others. The ensemble s reputation for excellence has encouraged composers to write … Wikipedia
Hypervalent molecule — A hypervalent molecule is a molecule that contains one or more main group elements formally bearing more than eight electrons in their valence shells. Phosphorus pentachloride (PCl5), sulfur hexafluoride (SF6), the phosphate (PO43−) ion, chlorine … Wikipedia
chamber music — music suited for performance in a room or a small concert hall, esp. for two or more, but usually fewer than ten, solo instruments. [1780 90] * * * Music composed for small instrumental ensembles and performed without a conductor. Traditionally… … Universalium
Counterpoint — For other uses, see Counterpoint (disambiguation). Extract from Fugue no. 17 in A flat major, BWV 862, from book 1 of The Well Tempered Clavier by Bach, who is widely regarded as the greatest practitioner of counterpoint.[ … Wikipedia
organosulfur compound — ▪ chemical compound Introduction also spelled organosulphur compound , also called organic sulfur compound a subclass of organic substances that contain sulfur and that are known for their varied occurrence and unusual properties. They are… … Universalium
