Atom the nucleus defines to what chemical element the atom belongs: for example, all copper atoms contain 29 protons. The number of neutrons defines the isotope of the element. The number of electrons influences the magnetic properties of an atom. Atoms can attach to one or more other atoms by chemical bonds to form chemical compounds such as molecules. The ability of atoms to associate and dissociate is responsible for most of the physical changes observed in nature and is the subject of the discipline of chemistry. The idea that matter is made up of discrete units is a very old
Ariel Atom 3.8 seconds. At the National Exhibition Centre in Birmingham, the Atom broke the indoor speed record. The high gloss floor that the cars ran on was only long, with an open door at the end of the hall. The driver of the Atom launched in fourth gear and still had wheelspin until the car reached and started to get traction. The Atom was beaten only by a class nine Autograss car powered by a 2.0l Lexus-Toyota touring car engine which set the official indoor speed record, beating the previous record held by a Toyota F1 car driven by "Top Gear"'s