covalent

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数据源: ai_enrichment
共价的是指原子间通过共享电子对形成化学键的一种方式,常见于非金属元素之间的结合。

用法要点

形容词用法

covalent 主要用作形容词,修饰名词,描述化学键或化合物的性质,通常用于科技或学术语境中。

• covalent bond
• covalent compound
• covalent interaction

介词搭配

covalent 常与介词 between 连用,表示原子之间的共价关系,强调共享电子的相互作用。

• covalent bond between atoms
• covalent linkage between molecules

语域说明

covalent 属于专业术语,主要用于化学、生物学、材料科学等学术领域,日常对话中较少使用,除非讨论相关主题。

• In organic chemistry, covalent bonds are fundamental.
• The covalent nature of the substance affects its properties.

句型结构

covalent 常用于 be 动词后作表语,或置于名词前作定语,描述事物的化学特性。

• The bond is covalent.
• They studied covalent modifications in proteins.

基础例句

In water molecules, hydrogen and oxygen atoms are held together by covalent bonds.

在水分子中,氢原子和氧原子通过共价键结合在一起。

Carbon atoms can form covalent bonds with many other elements in organic compounds.

碳原子可以在有机化合物中与许多其他元素形成共价键。

The covalent nature of this substance makes it stable under normal conditions.

这种物质的共价性质使其在正常条件下保持稳定。

When atoms share electrons equally, it results in a nonpolar covalent bond.

当原子平等共享电子时,会形成非极性共价键。

高级例句

In pharmaceutical research, covalent inhibitors are designed to bind irreversibly to target proteins, enhancing drug efficacy.

在药物研究中,共价抑制剂被设计成不可逆地结合靶蛋白,从而提高药效。

The covalent modification of histones plays a crucial role in epigenetic regulation and gene expression control.

组蛋白的共价修饰在表观遗传调控和基因表达控制中起着关键作用。

Advanced materials science explores covalent organic frameworks for applications in gas storage and catalysis.

先进材料科学探索共价有机框架在气体储存和催化方面的应用。

In biochemistry, disulfide bonds are covalent linkages between cysteine residues that stabilize protein structures.

在生物化学中,二硫键是半胱氨酸残基之间的共价连接,能稳定蛋白质结构。

高频搭配

adjective

covalent bondcovalent compoundcovalent interactioncovalent linkagecovalent attachment

noun

formation of covalent bondsstrength of covalent bondscovalent chemistrycovalent networkcovalent radius

verb

form covalent bondsbreak covalent bondsshare electrons covalentlydescribe as covalentinvolve covalent interactions

adverb

strongly covalentpartially covalentpredominantly covalenthighly covalent

preposition

covalent between atomscovalent in naturecovalent with other elements

phrase

covalent bondingcovalent charactercovalent modificationcovalent cross-linking

常见错误

❌ 错误:The atoms are covalently connected with ionic bonds.
✓ 正确:The atoms are connected by covalent bonds.

错误在于混淆了共价键和离子键。covalent 特指共享电子的键,而 ionic 涉及电子转移。应使用 by covalent bonds 来准确描述。

❌ 错误:This molecule has a covalent character, so it is easy to dissolve in water.
✓ 正确:This molecule has covalent bonds, but its polarity affects solubility in water.

错误在于过度简化。共价性质不一定直接导致水溶性,还需考虑极性等因素。应更精确地描述键的类型和性质对溶解性的影响。

近义词辨析

ionic

ionic 描述离子键,涉及电子转移和静电吸引,常见于金属和非金属之间;而 covalent 涉及电子共享,多见于非金属之间。

Sodium chloride has ionic bonds (Na+ and Cl-), whereas methane has covalent bonds (C and H sharing electrons).

metallic

metallic 描述金属键,涉及自由电子和阳离子之间的相互作用,具有导电性;covalent 则限于特定原子间的电子共享,通常不导电。

Copper exhibits metallic bonding with delocalized electrons, while diamond has a covalent network structure.