I was wondering if there was any way of representing a dative/coordinate covalent bond on a chemical diagram.
A single bond can easily be represented as a single line, a double bond as a double line and a triple bond as a triple line.
Take the below structure of ethene, a compound with single and double non-coordinate covalent bonds: each bond is easily represented by a single and double line.
However, the ammonium ion does have a coordinate bond between the lone pair of electrons on the nitrogen and the H+ ion from whichever compound donated it (e.g. hydrochloric acid). Despite this, I am unable to see how a coordinate bond could be represented, as, to me, it just looks like 4 non-dative covalent bonds.
Is there any way of representing a coordinate/dative covalent bond on diagrams like these?