Two materials physicists at The University of Sydney have found a possible explanation for the huge amount of molecular ...

Everyone at that time imagined the atom as a "plum pudding ... of light emitted by real hydrogen atoms. Bohr's theory that electrons existed in set orbits around the nucleus was the key to ...

Heavy water is a form of water with a unique atomic structure and properties ... molecule of heavy water contains two hydrogen atoms and one oxygen atom. The difference, though, lies in the ...

In fact, each gene in cellular DNA contains the code for a unique protein structure ... carbon atom linked to an amino group, a carboxyl group, a hydrogen atom, and a variable component called ...

The typical size of atoms and small molecules is around 1 × 10-10 m (0.1 nm). For example: diameter of a hydrogen atom, H 1.0 × 10-10 m width of a hydrogen molecule, H 2 2.9 × 10-10 m ...

Clathrates are characterized by a complex cage structure that provides space for guest ions too. Now a team has investigated the suitability of clathrates as catalysts for electrolytic hydrogen ...

An element's atomic number defines it. An element with 17 protons will always be chlorine. However an element's mass numbers can vary, which means that it can have different numbers of neutrons.

This image illustrates the general structure of an amino acid.The central carbon atom (C) is bonded to a hydrogen atom (H), an amino group (NH2), a carboxyl group (COOH), and a variable side chain (R ...