using the Periodic Table, you look at the number at the top of the column or group that the atom is in, say...... francium is in column 1 and row 7. since it's in column 1 it has 1 valance electron. and since its in row 7 it has 7 levels of electrons.
In order to find the valance of an element, you must plot out the element's Protons/Atomic # using the Bohr Diagram. The number of protons on the outermost ring is your answer.
If Da vALeNcE ElEcTrOnS Is 1 2 3 AnD 4 DaN vAlEnCy iS AlSo 1 2 3 Or 4
If vAlEnCe eLeCtRoNs aRe 5 6 7 Or 8 ThAn vAlEnCy iS 8-VaLeNcE ElEcTRoNz
multiply add and subtract
b
valency of lithium - 1
valency of Rf =4 valency of Db=5 valency of Sg=6 valency of Bh=7 valency of Hs=8 valency of Mt=unknown
+3 valency
the valency for nitrite is 5
the valency of boron is -3
valency of lithium - 1
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
the valency for nitrite is 5
Valency = 2 -