元素电负性是反映分子中原子对成键电子的吸引能力的概念。其计算方法和在元素周期表中的周期性变化以及各种应用需要在化学学习过程中加以关注。一、电负性概念的提出元素的电离势和电子亲和势可反映某元素的原子的失去和获得电子的能力,但这种反映并不完美,因为有些元素在形成化合物时,并没有失去和获得电子。为了更全面地反映分子中原子对成键电子的吸引能力,科学家又提出了元素电负性的概念。电负性综合考虑了电离能和电子亲和能,它以一组数值 Elemental electronegativity is a concept that reflects the attraction of atoms in the molecule to the bond-forming electrons. Its calculation method and periodic changes in the periodic table of the elements, as well as various applications, require attention in the chemistry learning process. First, the concept of electronegativity Elemental ionization potential and electron affinity can reflect the loss of an element of atoms and the ability to obtain electrons, but this reflection is not perfect, because some of the elements in the formation of compounds, and did not lose And get the electron. In order to more fully reflect the attraction of atoms in the molecule to bonding electrons, the concept of element electronegativity has also been proposed by scientists. Electronegativity synthetically considers ionization energy and electron affinity, which takes a set of values