2014年3月11日 · The model of the atom made by Neil Bohr depicts a positively charged nucleus surrounded by a negatively charged ring of electrons that travel in circular orbits. It was a large advancement in the field because Bohr's model described, for the first time, that an electron must absorb or omit energy to move between orbits.

2016年4月4日 · It is due mainly to the allowed orbits of the electrons and the "jumps" of the electron between them: Bohr tells us that the electrons in the Hydrogen atom can only occupy discrete orbits around the nucleus (not at any distance from it but at certain specific, quantized, positions or radial distances each one corresponding to an energetic state of your H atom) …

2015年10月30日 · Because hydrogen and hydrogen-like atoms only have one electron and thus do not experience electron correlation effects. Hydrogen-like atoms include H, He^(+), Li^(2+), Be^(3+), etc. The Bohr model of the atom claims that: The electron(s) orbit the nucleus Electrons don't electromagnetically radiate and thus stay in an orbit of constant radius and definite …

2014年8月16日 · The main problem with Bohr's model is that it works very well for atoms with only one electron, like H or He+, but not at all for multi-electron atoms. Bohr was able to predict the difference in energy between each energy level, allowing us to predict the energies of each line in the emission spectrum of hydrogen, and understand why electron energies are quantized. …

2018年1月13日 · Well, Bohr's model of the atom assumes fixed orbits AND trajectories for the electron. Simultaneously known orbits and trajectories violate the Heisenberg Uncertainty Principle. Bohr's model of the nitrogen atom is: The problem is, electrons do NOT travel in fixed orbits, and they do NOT travel with fixed trajectories. That is, they should NOT have …

2015年12月6日 · In Bohr model , the angular momentum is quantised. mvr = nh/2 pi It means that electron will revolve around nucleus only in that orbit whose angular momentum will satisfy that equation. Chemistry Science

2015年11月12日 · Bohr's model shows a hypothetical energy level, or quanta, at each energy state. When energy is applied to an electron surrounding a hydrogen atom it goes into an excited state. However, in physical science you learn that the universe tends to go to the lowest possible energy state, so when the electron goes back to its "ground state" it gives off energy, and that …

2016年4月20日 · The lines of the spectrum represented the different energy levels of the electons. Bohr based this assumption on the fact that there are only a few lines in the spectrum of the hydrogen atom and he believed that the lines were the result of light being released or absorbed as an electron moved from one orbit to another in the atom. As the electron moved further …

2015年12月2日 · Bohr model is valid only for hydrogen since it has one electron only, however, when it was applied to other elements, the experimental data were different than the theoretical calculations. Bohr model could me applied however, to Hydrogen-like ions where they have to loose all their electrons except one. For example: Ca^(19+), Li^(2+), Be^(3 ...

2014年11月3日 · Bohr's model is known as the planetary model. Rutherford found the nucleus with is gold foil experiment. His model of the atom had a small, dense, positively charged nucleus with the electrons all around the outside edge. In between the electrons and the nucleus was empty space. Rutherford's model can be compared to a peach. The nucleus is the pit and the …