No, it doesnot as Potassium has only one positive charge.
Iron trichloride: Fe3+Cl-13
PbO
Ion 2+=====
If the ion contains only one atom, it is an atom of scandium, for which the most common oxidation state in compounds is +3. However, in gas phase, +2 and +1 are also possible.
Neon does not form any compounds or ions.
+1
Examples are: PbO, PbNO3, PbCl, PbS, etc.
Mn2P2
PbO
Calcium forms a 2+ ion.
Ion 2+=====
The phosphide ion, meaning phosphorous by itself not bound up in a poly-atomic ion, has a charge of -3 in ionic compounds.
If the compound contains a polyatomic ion, simply name the ion.
You use the criss cross method to swith the charge of the element with the charge of the whole ion If the charge of the element is more than one then put the ion in parenthesis and then put the charge outside
If the ion contains only one atom, it is an atom of scandium, for which the most common oxidation state in compounds is +3. However, in gas phase, +2 and +1 are also possible.
It depends on the other elements attached to As. The charge could vary from -3 to +5 in its compounds.
Neon does not form any compounds or ions.
+2