These are particles possessing a positive charge, and are emited from radioactive elements. The particles are actually helium nuclei, ie. helium atoms that had lost their outer electrons. The study of the alpha particle played a major part in the developm
Found on
http://www.chemicalglossary.net/definition/103-Alpha_Particles
the helium nucleus.
Found on
http://www.chemistry-dictionary.com/definition/alpha+particles.php
A helium nucleus.
Found on
http://www.encyclo.co.uk/local/20728
Positively charged particles composed of two protons and two neutrons, i.e., helium nuclei, emitted during disintegration of very heavy isotopes; a beam of alpha particles or an alpha ray has very strong ionizing power, but weak penetrability. ... (12 Dec 1998) ...
Found on
http://www.encyclo.co.uk/local/20973
These are particles possessing a positive charge, and are emited from radioactive elements. The particles are actually helium nuclei, ie. helium atoms that had lost their outer electrons. The study of the alpha particle played a major part in the development of modern atomic theory. Rutherford bombarded other elements with alpha particles to produce nuclear disintegration.
...
Found on
http://www.encyclo.co.uk/visitor-contributions.php
Alpha Particles are the nuclei of the atom of helium, comprising two neutrons and two protons, and thus exhibiting a positive electric charge.
Found on
http://www.probertencyclopaedia.com/browse/GA.HTM
No exact match found.
