what is carbon affinity
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Electron affinity is defined as the change in energy (in kJ/mole) of a neutral atom (in the gaseous phase) when an electron is added to the atom to form a negative ion. In other words, the neutral atom's likelihood of gaining an electron.
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The electron affinity of the carbon atom is estimated to be 2.2 e.v. from linear extrapolation of the ionization potentials of the isoelectronic sequence C−, N, O+, F++, and Ne+++. Experimentally it is shown that a carbon filament above 1850°K. gives off negative ions under proper conditions.
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