Atom 04 : Nuclear Energy and Nuclear Disasters. According to atomic theory, the smallest quantity of an element which is capable of entering into chemical combination or that can exist alone. (Bul D11)
The Mudblogger (Oilfield, Energy and Related Photographs), Oil Field Glossary, TX, USA 2014. http://mudblogger.com/oilfield-glossary/, (Oil - Amer) {777}