covalency

In chemistry|lang=en terms the difference between valency and covalency

is that valency is (chemistry) valence while covalency is (chemistry).

As nouns the difference between valency and covalency

is that valency is (graph theory) the number of edges connected to a vertex in a graph while covalency is (chemistry).

As a noun covalency is

(chemistry).

As a noun covalency is

(chemistry).

As nouns the difference between taxonomy and covalency

is that taxonomy is the science or the technique used to make a classification while covalency is (chemistry).