Читать книгу Materials for Biomedical Engineering - Mohamed N. Rahaman - Страница 59

Covalent bonding involves sharing of electrons between two atoms but the shared electrons are localized between the two atoms and do not move freely. Depending on the number of valence electrons, atoms can each share one or more electrons, giving single, double or triple bonds. Common examples include hydrogen (H₂) and chlorine (Cl₂) molecules that share one electron each (single bond), oxygen (O₂) sharing two electrons each, and nitrogen (N₂) molecules sharing three electrons each.