covalent bond

音標(biāo)發(fā)音

What's the definition of the covalent bond?
共價(jià)鍵的定義是什麼？
The ability of an atom to attract electrons, and in particular, in a covalent bond.
原子對(duì)電子的吸引能力，特別是在共價(jià)鍵中。
A covalent bond is any time we have a pair of electrons that is shared between two different atoms.
所謂共價(jià)鍵就是我們有兩個(gè)原子,共用一對(duì)電子。

He said that the percent ionic character, and this is within a bond, not for a compound, for a covalent bond.
他提到離子百分?jǐn)?shù)，是指一根鍵中，竝非一個(gè)分子中。
麻省理工公開課 - 固態(tài)化學(xué)導(dǎo)論課程節(jié)選
A covalent bond is any time we have a pair of electrons that is shared between two different atoms.
所謂共價(jià)鍵就是我們有兩個(gè)原子,共用一對(duì)電子。
麻省理工公開課 - 化學(xué)原理課程節(jié)選
Likewise, the element that is a good electron acceptor in an electron transfer reaction is going to be the element that is going to hog the electrons in a covalent bond.
同樣的，這個(gè)元素在一個(gè)電子轉(zhuǎn)移反應(yīng)中,是個(gè)很好的受贈(zèng)者它將成爲(wèi)在共價(jià)電子,中吸引電子的元素。
麻省理工公開課 - 固態(tài)化學(xué)導(dǎo)論課程節(jié)選

Avocados have become popular in restaurants and homes because, in food-science terms, they act as a "covalent bond" with other ingredients.
NPR: What's in a Name? The Avocado Story

a chemical bond in which two atoms share one or more pairs of electrons that hold them together

a type of chemical bond involving the sharing of electrons between atoms in a molecule, esp the sharing of a pair of electrons by two adjacent atoms