3/15/2024 0 Comments Neils bohr atomic modelBohr proposed that electrons do not radiate energy as they orbit the nucleus, but exist in states of constant energy that he called stationary states. However, his model worked well as an explanation for the emissions of the hydrogen atom, but was seriously limited when applied to other atoms. Bohr's Atomic Model Following the discoveries of hydrogen emission spectra and the photoelectric effect, the Danish physicist Niels Bohr (1885-1962) proposed a new model of the atom in 1915. Moving up the ladder increases your potential energy, while moving down the ladder decreases your energy.īohr's work had a strong influence on our modern understanding of the inner workings of the atom. As you move up or down a ladder, you can only occupy specific rungs and cannot be in the spaces in between rungs. An everyday analogy to the Bohr model is the rungs of a ladder. The electron is not allowed to occupy any of the spaces in between the orbits. The orbits that are further from the nucleus are all of successively greater energy. ![]() The ground state of the hydrogen atom, where its energy is lowest, is when the electron is in the orbit that is closest to the nucleus. When the electron is in one of these orbits, its energy is fixed. It accounts for a wide range of physical phenomena, including the existence of discrete packets of energy and matter, the uncertainty principle, and the exclusion principle.Īccording to the Bohr model, often referred to as a planetary model, the electrons encircle the nucleus of the atom in specific allowable paths called orbits. This is a theory based on the principle that matter and energy have the properties of both particles and waves. Niels Bohr which after his PhD circa 1912 had joined Rutherford realized that. All of the negative charge was held in the electrons, orbiting the dense nucleus like planets around the sun. This was the basis for what later became known as quantum theory. This model depicted an atomic model with nearly all its mass, and positive charge, in a central nucleus about 10,000 times smaller than the atom itself. When the energy is removed, the electrons return back to their ground state, emitting a corresponding amount of energy-a quantum of light, or photon. (Credit: Zachary Wilson Source: CK-12 Foundation License: CC BY-NC 3.0(opens in new window))īohr explained that electrons can be moved into different orbits with the addition of energy. Niels Bohr in front of the University of Cambridge. \): Bohr's atomic model hydrogen emission spectra.
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