Chemistry

Molecules at an Exhibition: Portraits of Intriguing Materials in Everyday Life

John Emsley writes about chemistry for the lay person, but manages to bring to light facts and anecdotes that will delight chemists and chemical educators. What is "the worst smell in the world"? - and how is it used to protect us? What radioactive element is used in smoke detectors? What's the secret of Coca Cola? What chemical turns men on?

Is Combustion of Plastics Desirable?

Amongst the components of the refuse of modern societies, the one that potentially could supply the largest amount of energy on combustion is plastics (which are, of course, processed petroleum). So why are there not more efforts to convert this resource to energy, instead of putting nearly all of it into landfills?

The Periodic Table and the Electron

Nearly everyone who teaches introductory chemistry courses, whether in secondary schools or in universities, makes the connection between the periodic table and electronic configurations. Eric Scerri provides history and science that can make the discussion of that topic both more historically and scientifically accurate.

The Limelight

Heat a ball of lime in a hydrogen-oxygen flame, and what do you get? Limelight! This very intense light source was used for lighting plays (hence the modern usage of the word), but it also was the source for the record distance, for a time, over which man-made light was observed.

Observation of Interference Between Two Bose Condensates

The very first of "Hal's Picks", back in 1995, was the announcement of the first experimental observation of a Bose-Einstein condensate. This can be considered as a new phase of matter, in which atoms in a cold cluster lose their separate identities, because their deBroglie wavelengths exceed the dimension of the group in which they find themselves.

Enantiomeric Excesses in Meteoritic Amino Acids

The origin of the molecular "handedness" that pervades earth's biology has been an evolutionary puzzle. Given that right and left-handed amino acids have equal energies, why do only the left-handed ones participate in biosynthesis? One hypothesis is that life started from templates that arose from extraterrestrial sources, such as meteors.