Absorption
and emission of radiation by an atom an electron revolving around the
nucleus may capture an incident photon. Once that occurs, the electron is
raised to a higher energy level and thus changes its orbit to a one with a
larger radius
Hydrogen - Deuterium - Tritium Deuterium and tritium are isotopes of
hydrogen. This means that they differ from hydrogen only in the amount of
neutrons in their nuclei. Deuterium has one extra neutron, and tritium has two, swf file
Rutherford experiment
simulates diffraction of alpha particles (helium nuclei containing two positive charges)
by a thin foil made of gold metal,
Rutherford experiment
Rutherford experiment
these Java applets show two early models of the atom. A stream of alpha
particles shoot at the atom and are deflected. One models the atom as a jelly of
electrons. The other models it as a nucleus surrounded by electrons
X-rays
XRays are created by bashing high kinetic energy electrons into a
positive target preferably made of heavy metal. ( Usually tungsten nowadays ).
TV tubes and computer monitors produce XRays as electrons are accelerated to a
halt in the glass
