Chemistry is a branch of physical science that studies the composition, structure, properties and change of matter. Chemistry includes topics such as the properties of individual atoms, how atoms form chemical bonds to create chemical compounds, the interactions of substances through intermolecular forces that give matter its general properties, and the interactions between substances through chemical reactions to form different substances.
Chemistry is sometimes called the central science because it bridges other natural sciences, including physics, geology and biology. For the differences between chemistry and physics see comparison of chemistry and physics.
Scholars disagree about the etymology of the word chemistry. The history of chemistry can be traced to alchemy, which had been practiced for several millennia in various parts of the world....LESS
LOS ANGELES (AP) — Swiss scientist Albert Hofmann may have invented LSD in the 1930s, and Timothy Leary was clearly its most prominent frontman in the 1960s. But it was an obscure, self-taught chemist named Nicholas Sand who was the true wizard behind the curtain.