ehild said:
ehild said:
Consider why momentum is always conserved but kinetic energy isn't in a collision. With momentum, there's no way to "hide" it inside the object. If an object of mass m has momentum p, it has to move with speed v=p/m. Energy, however, can be hidden inside the object, for example, by heating it up, so energy gained by an object doesn't have to be in the form of kinetic energy. When some of the initial kinetic energy gets turned into this hidden form, you get an inelastic collision.vkash said:
Bohr's model is a simplified representation of the structure of hydrogen-like atoms, which have only one electron. It proposes that electrons orbit the nucleus in specific energy levels, and that they can only transition between these levels by emitting or absorbing energy.
Bohr's model helped to explain the spectral lines observed in the emission and absorption spectra of hydrogen-like atoms. It also introduced the concept of discrete energy levels and quantized energy, which was a major breakthrough in understanding the behavior of electrons.
Bohr's model only applies to hydrogen-like atoms with one electron. It does not accurately predict the behavior of atoms with more than one electron, as it does not take into account the repulsion between these electrons. It also does not explain the fine details of spectral lines.
According to Bohr's model, electrons occupy specific energy levels and do not lose energy as they orbit the nucleus. This results in a stable configuration for the atom, as the electrons do not spiral into the nucleus. Additionally, the model proposes that electrons can only exist in specific energy levels and cannot occupy the space in between, providing further stability.
Both models propose that electrons occupy specific energy levels and can transition between them by emitting or absorbing energy. They also both agree that the nucleus contains protons and neutrons, and that the majority of an atom's mass is located in the nucleus. However, the modern atomic model includes more complex concepts such as electron clouds and probability distributions.
