As (arsenic) has the 3- charge while Cu (copper) has a 1+ charge.
Copper arsenide = Cu3As
Generally P3- ion in phosphides (so, charge is -3)
Phosphite has an ionic charge of -3.
The Iron has a 3+ charge, but the Cl each have a -1 charge so they balance out to an even charge of +/- 0
The charge for bismuth (Bi) is typically +3.
The chemical formula for cuprous arsenide is Cu3As.
The molecular formula for copper(I) arsenide is Cu3As.
Copper arsenide = Cu3As
Copper (III) doesn't exist; copper(II) arsenide is Cu3As2.
Generally P3- ion in phosphides (so, charge is -3)
3- so N3-
Phosphite has an ionic charge of -3.
The Iron has a 3+ charge, but the Cl each have a -1 charge so they balance out to an even charge of +/- 0
The charge for bismuth (Bi) is typically +3.
The charge on iron in Fe(NO3)3 is +3. This is because nitrate (NO3) has a charge of -1, and there are three nitrate ions in the compound, making the total negative charge -3. In order for the compound to be neutral, the iron ion must have a charge of +3.
+3 because there are three more protrons than electrons making the charge be positive 3
The charge on ion X in X2O3 is +3. This is because the overall charge of the compound is neutral, and there are three oxygen atoms each with a charge of -2, so the X ion must have a charge of +3 to balance it out.