![]() Shells: The path taken by the electrons around the nucleus are termed as shells or orbits.The location of an electron with respect to the nucleus depends upon the energy of the electron. Electrons: The negatively charged entities that move in fixed circular paths orbiting the nucleus of an atom.These are denoted by using the symbol n°. Neutrons: These are the neutral entities present inside the nucleus of an atom and are responsible for most physical properties of atoms.Protons: These are the positively charged entities present in the nucleus of an atom and are represented through the symbol p +.It derives its positive charge owing to the positively charged protons. Nucleus: The centre or core of the atom comprising neutrons and protons.electrons, protons, and neutrons.īefore we dig deep into the Bohr model of the atom we should first understand a few important terms related to this model used in describing the structure of an atom. The Bohr model of atom defines the atomic structure of elements through a pictorial representation illustrating all the atomic particles viz. In this model, he postulated that every electron moves in a pre-decided orbit having fixed size and energy. Niel Bohr modified this model and presented the improvised Bohr-Rutherford model of the atom in 1913. The Rutherford model of the atom proposed in 1911 could not explain the stability of electrons while moving around the nucleus.Īs per the classical mechanics and electromagnetic theory such particles could not remain stable and would lose energy.
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