While the concepts and definitions of valence have been refined over the years, that described by Sidgwick remains the most useful and simple definition for covalent molecules: the valence of an …

Valence是英语中的多义术语，源于拉丁语"valentia"（力量），19世纪引入化学领域，表示原子在化合物中结合能力的量化指标，包括原子价、化合价等核心概念。

4. A valence is an embroidered rectangular piece placed above curtains. They were embroidered with fancywork to serve as a decoration. 门帘 眉 是 门帘 上方 的 一块 长方形 刺绣 品， 绣 有 吉祥 图案 …

The meaning of VALENCE is the degree of combining power of an element as shown by the number of atomic weights of a monovalent element (such as hydrogen) with which the atomic weight of the …

Although deliverers are often more influential than recipients in determining the valence of a delivery, recipients use more intense prosody in ascribing valence.

A valence electron is an electron that is associated with an atom, and that can participate in the formation of a chemical bond; in a single covalent bond, both atoms in the bond contribute one …

valence, in chemistry, the property of an element that determines the number of other atoms with which an atom of the element can combine. Introduced in 1868, the term is used to express both the power …

Valence (chemistry) In chemistry, valence, also known as valency or valency number, is a measure of the number of chemical bonds formed by the atoms of a given element.

Jan 24, 2019 · Valence is typically the number of electrons needed to fill the outermost shell of an atom. Because exceptions exist, the more general definition of valence is the number of electrons with …

A.S. Mogoda 1, * and K. M. Zohdy 2 1 Chemistry Department, Faculty of Science, Cairo University, Giza 12613, Egypt 2 Higher Technology Institute, Tenth of Ramadan City, Egypt * E-mail: …