n.价，化合价，原子价，组配数限，配价(一个词，尤指动词，在句子中结合的语法成分的数目)

原形：valency复数：valencies

The valency of carbon is four, meaning it can form four covalent bonds with other atoms.
碳的价数是四，意味着它可以与其他原子形成四个共价键。
In the compound water (H2O), oxygen has a higher valency than hydrogen.
在水分子(H2O)中，氧的价数高于氢。
The valency of nitrogen allows it to form up to three single bonds with other atoms.
氮的价数允许它与其他原子形成最多三个单键。
Sodium (Na) has a valency of one, which means it tends to lose an electron easily.
钠(Na)的价数是一，这意味着它倾向于容易失去一个电子。
The valency of chlorine (Cl) is usually considered to be one or two in chemical reactions.
氯(Cl)在化学反应中的价数通常被认为是1或2。
In the molecule methane (CH4), carbon has a valency of four and each hydrogen atom has a valency of one.
在甲烷(CH4)分子中，碳的价数是四，而每个氢原子的价数是一。
The valency of sulfur varies depending on the compound, ranging from two to six.
硫的价数取决于化合物，范围从二到六。
In the periodic table, elements in group 17 (halogens) have a valency of one.
在元素周期表中，第17组(卤族元素)的元素的价数为一。
Nitrogen in its most common forms like N2 or NH3 has a valency of three.
氮在N2或NH3等常见形式中具有价数三。
The valency of phosphorus (P) in its compounds can range from three to five, depending on the specific compound.
磷(P)在其化合物中的价数可能因特定化合物而变化，在三到五之间。