Mulliken scale: Meaning (information, definition, explanation, facts)
The Mulliken scale (also called Mulliken-Jaffe scale) is a scale for the electronegativity of chemical elements. It was developed by Robert S. Mulliken in 1934. It is based on the Mulliken electronegativity, cM, which is related to the electron affinity EAv (the tendency of an atom to become negatively charged) and the ionization potential IEv (the tendency of an atom to become positively charged):
cM = (IEv + EAv)/2
Some example values:
| Element | Al | Ar | As | B | Be | Br | C | Ca | Cl | F | Ga | Ge | H | I | In | K | Kr | Li |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| cM | 1.37 | 3.36 | 2.26 | 1.83 | 1.99 | 3.24 | 2.67 | 1.30 | 3.54 | 4.42 | 1.34 | 1.95 | 3.06 | 2.88 | 1.30 | 1.03 | 2.98 | 1.28 |
| Element | Mg | N | Na | Ne | O | P | Rb | S | Sb | Se | Si | Sn | Sr | Te | Xe |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| cM | 1.63 | 3.08 | 1.21 | 4.60 | 3.21 | 2.39 | 0.99 | 2.65 | 2.06 | 2.51 | 2.03 | 1.83 | 1.21 | 2.34 | 2.59 |
- See also : Pauling scale -- Allred-Rochow scale -- Electronegativity
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