Atom to the positively charged nucleus by the attraction created from opposite electric charges. If an atom has more or fewer electrons than its atomic number, then it becomes respectively negatively or positively charged as a whole; a charged atom is called an ion. Electrons have been known since the late 19th century, mostly thanks to J.J. Thomson; see history of subatomic physics for details. Protons have a positive charge and a mass 1,836 times that of the electron, at . The number of protons in an atom is called its atomic number. Ernest Rutherford (1919) observed that nitrogen under alpha-particle
Ariel Atom Ariel Atom The Ariel Atom is a road legal high performance sports car made by the Ariel Motor Company based in Crewkerne, Somerset, England, and under licence in North America by TMI Autotech, Inc. at Virginia International Raceway in Alton, Virginia. There have been eight Ariel Atom generations to date: Ariel Atom, Ariel Atom 2, Ariel Atom 3 (including the Ariel Atom 3 Mugen Limited Edition and Honda Racing Edition – of which only one was made) Ariel Atom 3.5, Ariel Atom 3S, Ariel Spec:Race Atom, Ariel Atom 500 V8 Limited Edition (only 25 to be made), and the Ariel