Icebergs float on water because the underlying liquid water has a higher density than the iceberg. Liquid water itself has its highest density at 4°C—one of the so-called anomalies of water, i.e.

A crystal of graphite and its structure -- Electrons and atomic nuclei -- Electron shells -- The periodic table of the elements -- The hydrogen molecule -- Valence -- History of the water molecule -- ...

Now, after nearly 25 years of work by chemists at the University of California, Berkeley, those hydrocarbon bonds -- two-thirds of all the chemical bonds in petroleum and plastics -- have fully ...

Researchers around the world are working to develop efficient materials to convert CO2 into usable chemical substances -- work that is particularly pressing in view of global warming. A team has ...

The carbon-hydrogen bond -- 2/3 of all bonds in hydrocarbons -- has defied chemists' attempts to open it up and add new chemical groups. A team has now cracked the strongest of C-H bonds, those on a ...

Water has a split personality. When it’s flowing freely in a glass or a river, it’s the easygoing liquid we all know. But trap it inside the tiny pockets of a protein or a synthetic molecule, and it ...