The term Monovalent is used to describe any atom that can form 1 bond i.e. it has a valency of +1 or -1.
- Monovalent elements like hydrogen and chlorine that have a valency of +1 and -1 respectively.
A quick cheat is to look at the periodic table to identify the valency. All elements in group 1 have a valency of +1 while all elements in group 7 have a valency of -1.
- We can also have monovalent functional groups. Examples include the tertiary amine group (R3N), the amino group (−NR’R).