Donor atoms are atoms in a molecule that donate electron pairs to form a coordinate bond. These atoms can be identified by their electron configuration and electronegativity. There are various synonyms for the term "donor atom" such as "ligand atom", "coordination atom", "binding atom" and "acceptor atom". The term "ligand atom" is commonly used in the field of coordination chemistry when referring to atoms that bind to a central metal atom or ion. The term "coordination atom" is used to express the role of an atom in a coordination complex. "Binding atom" and "acceptor atom" are often used to refer to the same concept in different contexts. Nevertheless, these synonyms provide a wider range of vocabulary when discussing donor atoms and their functions.