The common valences of cobalt are +2 and +3.
Cobalt is a transition metal. It can have variable valencies (oxidation state), with 2 and 3 being the most common valencies.
-1 for each F and +3 for Co
Symbol: Cl-Valency: -1.
+1
You don't say that. What you do say is that the valency of sulphur in sulphur trioxide is 6.
The perchlorate ion has one available bond.
As far as I am aware, CO is not a unit of measure.
silicon is 4 not 6
valency of lithium - 1
Two, unless an oxygen atom is bonded to another oxygen atom or to a fluorine atom.
valency of Rf =4 valency of Db=5 valency of Sg=6 valency of Bh=7 valency of Hs=8 valency of Mt=unknown
-1 valency
The valency of sulfur is 2-. The valency of sulfur is 2-. The valency of sulfur (S) is +2
The valency of sodium is +1
PO4 has its valency 3 but, PO3 also has its valency 3
+3 valency
Its valency is 0.
the valency is 4
+4 valency