chemical bond 托福

The essential feature of monomer molecules is the ability to form chemical Bonds (see Bonding) with at least two other monomer molecules (polyfunctionality).

单体分的基本特性是至少能与两个其它单体分化学键的能力(多能性)。

A method to calculate new valence electronegativity and the ionicity of chemical bond of the transition metal elements is also presented here.

提出了计算素价态共价半径的公式;提出了计算素新价态电负性和化学键的离性的方法。