A rotaxane consisting of a crown ether threaded on a dumbbell-shaped structure (top). When light shines on it (model, bottom) the crown ether (C is yellow; H, white; and O, orange) moves along the ...

Part of Chemistry (Single Science) Chemicals of the natural environment The general formula for the alkanes is C n H 2n+2 (where n is the number of carbon atoms in the molecule). The table shows four ...

You might know that H20 is the chemical formula for water, but what about the chemistry of you? Dr Joe Hanson, a science writer and biologist based in Austin, Texas, pondered this very question and ...

General Introduction: Importance and scope of Chemistry. Nature of matter, laws of chemical combination, Dalton's atomic theory: concept of elements, atoms and molecules. Atomic and molecular masses, ...