covalent bond
noun [ C ] chemistry specialized uk/kəʊˌveɪ.lənt ˈbɒnd/ us/koʊˌveɪ.lənt ˈbɑːnd/
共价键（原子间共享电子而形成的化学键）
a chemical bond in which two atoms share one or more pairs of electrons that hold them together
These solids have very high melting points because their atoms are linked together with strong covalent bonds.
Carbon and silicon exist as giant molecular structures held together by single covalent bonds.
- More examples
- A single covalent bond is represented by a single line between the atoms.
- In ceramics, the electrons are firmly held in strong covalent bonds and are not available for reaction.
- A shared pair of electrons is called a single covalent bond, or a bond pair.