Niels Bohr studied the emission lines of Hydrogen.
Each energy level corresponds to an exact amount of energy needed by the electron to orbit the nucleus. Transitions from a higher energy level to a lower energy level correspond to the difference in the energy needed for an electron to occupy those two energy levels. This difference creates the emission spectrum.
In Bohr's model there are stationary orbits in which though the electrons are subjected to centrifugal acceleration, they will not give out any kind radiation. But in Rutherford's model no such stationary orbits. In case Bohr's model, line spectrum is possible. But in Rutherford's model, continuous spectrum is expected. But no such spectrum emitted by atoms especially hydrogen atom
valence electrons are the electrons found in the outermost energy level of bohr diagram for an element.
Empedocies, Democritus, John Dalton, rutherford, bohr ,isotopes,and Emily Johnston
Niels Bohr invented the bohr diagram.
Niels Bohr in 1913.
Bohr used the emmision spectrum of an element.
For a detailed explanation on the relation between spectrum lines electron energy check out avogadro.co.uk/light/bohr/spectra.htm
it is produced when an electron from a higher energy orbit drops down to a lower level of energy orbit.
Bohr based his atomic model on the element hydrogen. He applied his model to the hydrogen atom and found that it provided an explanation for its line spectrum.
It's produced when an electron from a higher energy orbit drops down to a lower level energy orbit
The formula parallel to Rydberg's formula used in Bohr's theory of the emission spectrum of the hydrogen atom is the Balmer Series. See related link for more information.
Each energy level corresponds to an exact amount of energy needed by the electron to orbit the nucleus. Transitions from a higher energy level to a lower energy level correspond to the difference in the energy needed for an electron to occupy those two energy levels. This difference creates the emission spectrum.
Niels Bohr won a Nobel Prize in Physics, and this was his area of study and specialty.
To explain atomic emission spectra. Using the Bohr Model of a hydrogen atom, deriving the frequency of these emission lines is almost trivial. Without the Bohr Model, deriving them is impossible. Also, the "classical" model of electrons in an atom, acting like planets around a nucleus, would result in complete collapse of such an atom in a small fraction of a second.
Niels Bohr coined the term "element."
Ernest Rutherford