馋言碎语的意思（核言碎语196）
馋言碎语的意思（核言碎语196）χ = 4.0氟的电负性为:Electronegativity symbol χ is a chemical property that describes the tendency of an atom to attract electrons towards this atom. For this purpose a dimensionless quantity the Pauling scale symbol χ is the most commonly used.电负性，符号χ，是一种化学性质，描述了一个原子吸引电子向此原子的趋势。为了这个目的，一个无量纲的量，鲍林标度，符号χ，是最常用的。The electronegativity of fluorine is:
144 电负性-鲍林标度
Electronegativity – Pauling Scale
（https://www.nuclear-power.com/）
电负性-鲍林标度
Electronegativity symbol χ is a chemical property that describes the tendency of an atom to attract electrons towards this atom. For this purpose a dimensionless quantity the Pauling scale symbol χ is the most commonly used.
电负性，符号χ，是一种化学性质，描述了一个原子吸引电子向此原子的趋势。为了这个目的，一个无量纲的量，鲍林标度，符号χ，是最常用的。
The electronegativity of fluorine is:
氟的电负性为:
χ = 4.0
An atom’s electronegativity is generally affected by both its atomic number and the distance at which its valence electrons reside from the charged nucleus. The higher the associated electronegativity number the more an element or compound attracts electrons towards it.
一个原子的电负性一般受其原子序数和价电子与带电原子核的距离的影响。相关的电负性数越高，一种元素或化合物吸引的电子越多。
As it is usually calculated electronegativity is not a property of an atom alone but rather a property of an atom in a molecule. Even so the electronegativity of an atom is strongly correlated with the first ionization energy and negatively correlated with the electron affinity. Electrons with low ionization energies have low electronegativities because their nuclei do not exert a strong attractive force on electrons. Elements with high ionization energies have high electronegativities due to the strong pull exerted by the positive nucleus on the negative electrons. Therefore the electronegativity is greatest at the top-right of the periodic table and decreases toward the bottom-left.
正如通常计算的那样，电负性不是单独一个原子的性质，而是分子中一个原子的性质。尽管如此，原子的电负性与第一电离能密切相关，与电子亲和能呈负相关。具有低电离能的电子具有低的电负性，因为它们的原子核对电子不施加强的吸引力。高电离能的元素由于正核对负电子的强引力而具有高的电负性。因此，电负性在元素周期表的右上方最大，而向左下方时减小。
Caesium is the least electronegative element (0.79); fluorine is the most (3.98).
铯是电负性最小的元素（0.79）；氟的最大（3.98）。
注：
（以下内容来自百度百科）
鲍林提出了描述原子吸引电子的能力的计算方法。电负性不能直接测量，而是从其他原子或分子的性质计算得到的。最常使用的方法是由鲍林(Pauling)提出的，是1个无单位的量。相应的标度从0.7到4.0。
（待续）
