Lewis acids and bases studied chemical bonding. In 1923, Lewis wrote "An acid substance is one which can employ an electron lone pair from another molecule in completing the stable group of one of its own atoms." The Brønsted–Lowry acid–base theory was published in the same year. The two theories are distinct but complementary. A Lewis base is also a Brønsted–Lowry base, but a Lewis acid doesn't need to be a Brønsted–Lowry acid. The classification into hard and soft acids and bases (HSAB theory) followed in 1963. The strength of Lewis acid-base interactions, as measured by the standard enthalpy of formation of an adduct
Magic in the Air (Magic System song) Magic in the Air (Magic System song) "Magic in the Air" is a 2014 single by Ivorian musical group Magic System, featuring Moroccan singer Chawki and produced by Moroccan producer RedOne. The track also appears on Magic system's album "Africainement vôtre," released on 19 May 2014. The association football themed song focusing on African football was produced by Swedish-Moroccan producer RedOne with the catchy refrain saying On t'invite à la magie, y a pas de raccourci,<br> Oublie tes soucis, viens faire la folie<br>Feel the magic in the air, allez allez allez, <br>Levez les mains en l'air, allez allez allez. which