About the atomic model proposed by Bohr, the only alternative below that is incorrect is: ( ) Although Bohr's model of the hydrogen atom involves reasoning from classical mechanics, he was able to adequately describe the energy states of the hydrogen atom. ( ) The quantum leaps proposed by the Bohr model were able to describe the discrete emission spectra observed in a gas-discharge tube experiment, where atoms are brought into excited states by collision with electrons moving through the tube. ( ) Although atoms have discrete energies, they can be brought into excited states by inelastic collision with, for example, . an electron. This process occurs even if the initial kinetic energy of the electron is not exactly equal to the difference between the energies of the initial and final states of the atom. ( ) In the discrete spectra of a gas, it is observed that every wavelength present in the absorption spectrum also belongs to the emission spectrum, which is explained by the model when considering quantized atomic energies and the ground state. ( ) The model was applied to the hydrogen atom because it is simpler, but it is able to describe the emission and absorption spectra of all other atoms.
Atomic Spectra
According to the Bohr model of an atom, the electron in an atom moves around a nucleus in fixed orbits with specific energies known as energy levels. The orbital energies are quantized. The electrons remain in these energy levels until they emit or absorb a photon of a particular wavelength, the quantum of energy. If the electron emits a photon, it then falls back to a lower energy level, and if it absorbs a photon, the electron rises to higher energy levels. The photons released or absorbed in these transitions of an electron are studied and analyzed on a screen as atomic spectra.
Ruby Lasers
Lasers are devices that emit light using atoms or molecules at a certain wavelength and amplify the light to produce a narrow beam of radiation. It works as per the principle of electromagnetic radiation. Their source of emission contains the same frequency and same phase. It was invented in the year 1960 by the great noble scientist, Theodore Maiman.
Balmer Series
The spectrum of frequency observed when electromagnetic radiation is emitted from an atom when it goes from higher energy state to lower state, is known as emission spectrum. This transition occurs when an excited electron moves from higher to lower state. It has many possible electron transitions and each transition has a specific energy difference.
Emission Spectrum
Every state of matter tries to be at minimum potential energy or it can be said that the atoms of element/ substance arrange themselves such that overall energy is minimum.
About the atomic model proposed by Bohr, the only alternative below that is incorrect is:
( ) Although
( ) The quantum leaps proposed by the Bohr model were able to describe the discrete
( ) Although atoms have discrete energies, they can be brought into excited states by inelastic collision with, for example, . an electron. This process occurs even if the initial kinetic energy of the electron is not exactly equal to the difference between the energies of the initial and final states of the atom.
( ) In the discrete spectra of a gas, it is observed that every wavelength present in the absorption spectrum also belongs to the emission spectrum, which is explained by the model when considering quantized atomic energies and the ground state.
( ) The model was applied to the hydrogen atom because it is simpler, but it is able to describe the emission and absorption spectra of all other atoms.
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