Which one of the following statements is an assumption made by Bohr in developing his atomic theory? Photons have momentum. There are stationary states in which the electron does not radiate energy. Emission line spectra are a result of photons jumping from lower to higher energy levels. Emission line spectra are a result of electrons jumping from lower to higher energy levels.
Quantum mechanics and hydrogen atom
Consider an electron of mass m moves with the velocity v in a hydrogen atom. If an electron is at a distance r from the proton, then the potential energy function of the electron can be written as follows:
Isotopes of Hydrogen Atoms
To understand isotopes, it's easiest to learn the simplest system. Hydrogen, the most basic nucleus, has received a great deal of attention. Several of the results seen in more complex nuclei can be seen in hydrogen isotopes. An isotope is a nucleus of the same atomic number (Z) but a different atomic mass number (A). The number of neutrons present in the nucleus varies with respect to the isotope.
Mass of Hydrogen Atom
Hydrogen is one of the most fundamental elements on Earth which is colorless, odorless, and a flammable chemical substance. The representation of hydrogen in the periodic table is H. It is mostly found as a diatomic molecule as water H2O on earth. It is also known to be the lightest element and takes its place on Earth up to 0.14 %. There are three isotopes of hydrogen- protium, deuterium, and tritium. There is a huge abundance of Hydrogen molecules on the earth's surface. The hydrogen isotope tritium has its half-life equal to 12.32 years, through beta decay. In physics, the study of Hydrogen is fundamental.
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Photons have momentum.
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There are stationary states in which the electron does not
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Emission line spectra are a result of electrons jumping from lower to higher energy levels.
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Bohr's model of the atom is based on a number of basic ideas. Its main idea is that electrons can be in "stationary" states where they don't give off any energy. This means that electrons can stay in stable energy levels or orbits around the nucleus without constantly sending out electromagnetic waves. Instead, they only give off energy when moving from one of these higher energy stable states to a lower energy state. This is why the emission spectra of elements show discrete lines.
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