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Electron binding energy, more commonly known as ionization energy, [3] is a measure of the energy required to free an electron from its atomic orbital or from a solid. The electron binding energy derives from the electromagnetic interaction of the electron with the nucleus and the other electrons of the atom , molecule or solid and is mediated ...
The bond dissociation energy (enthalpy) [4] is also referred to as bond disruption energy, bond energy, bond strength, or binding energy (abbreviation: BDE, BE, or D). It is defined as the standard enthalpy change of the following fission: R—X → R + X. The BDE, denoted by Dº(R—X), is usually derived by the thermochemical equation,
Magnitude of the pairing term in the total binding energy for even–even and odd–odd nuclei, as a function of mass number. Two fits are shown (blue and red line). The pairing term (positive for even–even and negative for odd–odd nuclei) was derived from binding energy data. [6]
Nuclear binding energy in experimental physics is the minimum energy that is required to disassemble the nucleus of an atom into its constituent protons and neutrons, known collectively as nucleons. The binding energy for stable nuclei is always a positive number, as the nucleus must gain energy for the nucleons to move apart from each other.
The binding energy is subtracted from the sum of the proton and neutron masses because the mass of the nucleus is less than that sum. This property, called the mass defect, is necessary for a stable nucleus; within a nucleus, the nuclides are trapped by a potential well. A semi-empirical mass formula states that the binding energy will take the ...
The following table shows a series of Gibbs free energy of binding between benzene and several cations in the gas phase. [ 2 ] [ 6 ] For a singly charged species, the gas-phase interaction energy correlates with the ionic radius , r i o n {\displaystyle r_{\mathrm {ion} }} (non-spherical ionic radii are approximate).
Part of the acquired energy is used to liberate the electron from its atomic binding, and the rest contributes to the electron's kinetic energy as a free particle. [ 5 ] [ 6 ] [ 7 ] Because electrons in a material occupy many different quantum states with different binding energies, and because they can sustain energy losses on their way out of ...
The hydrogen anion is the dominant bound-free opacity source at visible and near-infrared wavelengths in the atmospheres of stars like the Sun and cooler; [2] its importance was first noted in the 1930s. [3] The ion absorbs photons with energies in the range 0.75–4.0 eV, which ranges from the infrared into the visible spectrum.
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