valency

A noun referring to the combining power of an element or radical, especially as measured by the number of hydrogen atoms it can displace or combine with; also used in biology to describe the capacity to interact with antigens or a biological substrate.

• 🇨🇳名词，指元素或原子团与其他原子结合的能力，尤以可取代或结合的氢原子数来衡量；在生物学中也指与抗原或生物底物结合的能力。

1. Chemical bonding capacity C1 formal scientific

   The ability of an atom or element to form chemical bonds, measured by the number of hydrogen atoms it can combine with.

   • Carbon has a valency of four, allowing it to form stable organic compounds.
   • The valency of oxygen is two, as seen in water molecules.
   • Understanding valency is essential for predicting molecular structures.

   🇨🇳化合价

   同义词: valence

2. Combining power in biology C2 formal scientific

   The relative capacity of a substance, such as an antigen, to interact or react with a biological substrate.

   • The valency of an antibody determines how many antigens it can bind.
   • Researchers studied the valency of the protein complex.
   • High valency in antigens can trigger stronger immune responses.

   🇨🇳生物学中的效价

   同义词: valence

3. Atomic combining power C1 formal scientific

   A property of atoms or radicals indicating their combining power, expressed in terms of the number of hydrogen atoms they can bond with.

   • The valency of nitrogen is three in ammonia.
   • Chlorine has a valency of one, forming compounds like HCl.
   • Valency helps classify elements into groups in the periodic table.

   🇨🇳化合价

   同义词: valence

• valencies plural form
• valencies' possessive plural form
• valency's possessive singular form