电负性常用的是LinusPauling的定义；XA-XB=(eV)-1/2{Ea(AB)- [Ea(AA)+Ea(BB)]/2)1/2Ea(AB)表示双原子分子AB的离解能;相对定义：只定义了元素A和B的电负性差值：无量纲化，指定F元素电负性为4；元素电负性数值越大，表示其原子在化合物中吸引电子的能力越强；反之，电负性数值越小，相应原子在化合物中吸引电子的能力越弱
电负性 常用的是Linus Pauling的定义； 𝜒𝐴−𝜒𝐵=(𝑒𝑉) − 1/2{𝐸𝑑 (𝐴𝐵)− [𝐸𝑑 (𝐴𝐴)+𝐸𝑑 (𝐵𝐵)]/2}1/2 𝐸𝑑 (𝐴𝐵)表示双原子分子AB的离解能； 相对定义：只定义了元素A和B的电负性差值; 无量纲化，指定F元素电负性为４； 元素电负性数值越大，表示其原子在化合物中吸引电子的 能力越强；反之，电负性数值越小，相应原子在化合物中 吸引电子的能力越弱
Linus CarlPauling>Linus Carl Pauling (February 28, 1901-August 19, 1994) wasan American chemist, peace activist, author, and educatorPauling worked in the fields of quantum chemistry, molecularbiology, and orthomolecular medicine.He is one of only fourindividuals to have won multiple Nobel Prizes. He is one ofonly two people to have been awarded a Nobel Prize in twodifferent fields (the Chemistry and Peace prizes.)> In1954, Pauling was awarded the Nobel Prize in Chemistry. Asbiochemist, Pauling conducted research with X-rayacrystallography and modeling in crystal and protein structures
➢Linus Carl Pauling (February 28, 1901-August 19, 1994) was an American chemist, peace activist, author, and educator. Pauling worked in the fields of quantum chemistry, molecular biology, and orthomolecular medicine. He is one of only four individuals to have won multiple Nobel Prizes. He is one of only two people to have been awarded a Nobel Prize in two different fields (the Chemistry and Peace prizes.) ➢In1954, Pauling was awarded the Nobel Prize in Chemistry. As a biochemist, Pauling conducted research with X-ray crystallography and modeling in crystal and protein structures. Linus Carl Pauling
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福Linus Pauling,1954, Nobel Prizefor Chemistry1962, Nobel Peace Prize.Linus Pauling said, "Danny Shechtman is talking nonsense.There is no such thing as quasicrystals, only quasi-scientists. "http://www.dailykos.com/story/2011/10/05/1022985/-Chemistry-Nobel:-Quasicrystals-Israeli-Found-New-Form-of-Matter-Imagined-in-Islamic-Art
Linus Pauling, 1954, Nobel Prize for Chemistry. 1962, Nobel Peace Prize. Linus Pauling said, "Danny Shechtman is talking nonsense. There is no such thing as quasicrystals, only quasi-scientists." http://www.dailykos.com/story/2011/10/05/1022985/-Chemistry-Nobel:- Quasicrystals-Israeli-Found-New-Form-of-Matter-Imagined-in-Islamic-Art
The correlation betweenMulliken electronegativities (x-axis,inkJ/mol) and Pauling electronegativities(y-axis).4.543.539 2.521.510.52004006008001000120014001600180020002200Xm/kJ mol-1
The correlation between Mulliken electronegativities (x-axis, in kJ/mol) and Pauling electronegativities(y-axis)