Gold only has one electron in its outer shell (according to Bohr’s naive model), which should make it highly reactive (think of calcium or lithium). As gold is such a massive or heavy atom these ...

Quantum physics began in 1900 when the German physicist Max Planck determined the scale of quantum phenomena. In 1905, Albert ...

Alpha-particle scattering experiment; Rutherford's model of atom; Bohr model of hydrogen atom, Expression for radius of nth possible orbit, velocity and energy of electron in nth orbit ...