Atomic Structure

Proton-neutron Theory In 1932, scientist Chadwick discovered neutron. Neutron is a chargeless particle whose mass is about the same mass of the proton. After the…

Structure of the Nucleus in Atom In 1911 scientist Rutherford and his associates Geiger and Marsden from α-particle scattering discovered that inside the atom at…

Limitation of Bohr’s Atom Model Bohr’s orbits are called permanent orbits because while orbiting these orbits electrons do not radiate energy. Although during orbiting electrons…

In 1913, famous Dutch scientist Niels Bohr proposed this model of the atom and in 1922 he got Nobel Prize for this discovery. Bohr proposed…

Bohr’s Atom Model In 1913, famous Dutch scientist Niels Bohr proposed this model of an atom and in 1922 he got Nobel Prize for this…

Atomic Mass Unit (amu) The mass of an atom is exceedingly small. So, its actual mass is not considered. The conventional unit of mass in…

Limitation of Rutherford’s Atom Model Although Rutherford’s atom model is more logical than Thomson’s model, it has some defects or limitations. The limitations of this…

Rutherford’s Atom Model In 1911, famous scientist Rutherford proposed a model of an atom. Through extensive experiments he observed the deflection or scattering from different…

Rutherford’s Alpha Particle Experiment Throughout the nineteenth century, scientists had the idea that each atom was composed of positive charges and these charges were distributed…

Successive development of Ideas on Atomic Structure From ancient times different philosophers gave different hypothesis about the structure of matter. First a Greek philosopher named…