calculate the number of electrons protons and neutrons in phosphate ion
Dear student
You need to figure out how many protons and electrons come from each atom in the polyatomic ion. Then you need to add or subtract the appropriate number of electrons to give the charge of the ion.
In a polyatomic ion, its number of protons is the total number of protons all the atoms within it.
For (PO4)3-
The typical P atom is 31P which has 15 protons, 16 neutrons, and 15 electrons.
The typical O atom is 16O which has 8 protons, 8 neutrons, and 8 electrons.
For (PO4)3- there would be (15+8+8+8+8 = 47 protons), (16+8+8+8+8 = 48 neutrons), and (15+8+8+8+8+3 = 50 electrons). The extra three electrons are due to the -3 charge on the phosphate ion.
You need to figure out how many protons and electrons come from each atom in the polyatomic ion. Then you need to add or subtract the appropriate number of electrons to give the charge of the ion.
In a polyatomic ion, its number of protons is the total number of protons all the atoms within it.
For (PO4)3-
The typical P atom is 31P which has 15 protons, 16 neutrons, and 15 electrons.
The typical O atom is 16O which has 8 protons, 8 neutrons, and 8 electrons.
For (PO4)3- there would be (15+8+8+8+8 = 47 protons), (16+8+8+8+8 = 48 neutrons), and (15+8+8+8+8+3 = 50 electrons). The extra three electrons are due to the -3 charge on the phosphate ion.