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Question

Explain the energy level diagram in detail.


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Solution

Energy level diagram

  • The energy level diagram shows the various discrete energy levels for an atom, ion, or molecule.
  • When an atom or molecule absorbs light or colloids with another atom with sufficient energy, it moves from lower energy to a higher energy state.
  • At the lowest possible energy, the atom and its electron are said to be in the ground state.
  • At higher possible energy, the atom and its electron are said to be excited.
  • When more than one quantum mechanical state is at the same energy they are called degenerate energy level

Information acquired from the Energy level diagram

  • Type of bonding will take place with a specific element and which electrons are being used.
  • Explanation of why definite elements behave in indistinguishable ways.

Energy level diagram of Hydrogen

  • In a hydrogen atom, an electron revolves around the nucleus at the lowest energy level.
  • When energy is supplied, the electron gains energy and moves up to a higher energy level.
  • The electron jumps from one energy level to the other when it loses its energy.
  • A several series denotes the jumps.
  • Lyman series - Electron comes to the lowest energy(n=1)
  • In the Lyman series the wavelength of light stays in the UV region.
  • Balmer series - Electron get down to n=2 from an excited state.
  • In the Balmer series the wavelength of light stays in the Visible Region.
  • Paschen series - Electron get down to n=3 from an excited state.
  • In the Paschen series the wavelength of light stays in the Infrared Region.

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