-3
The neutrals phosphorus carry zero charge atoms.
The most common charge for phosphorus is -3, as it typically forms an anion by gaining three electrons to achieve a stable electron configuration.
Phosphorus is number 15 on the Periodic Table of Elements. The most common charge is -3 because it needs three more electrons to fill it's outer shell.
The most common charge for sulfur is -2.
A Magnesium ion has a charge of 2+.
Water is the most common molecular subsance found in the human body(~98%). and phosphorous is the most abundant element in human body.
The most common charge for an iodine ion is -1.
-3
-2
The most common electric charge for a calcium cation is +2.
The formula for phosphorous (III) oxide is determined by the electron shells of the phosphorus and oxygen. Oxygen is in group 6, so it will gain 2 electrons to have a charge of -2 per atom. The Roman numerals (III) with the phosphorous tells us that the phosphorous atoms are in a +3 state, and Roman numerals are used to tell us the ionization state of atoms that have multiple possible states. The common factor of oxygen's 2 and phosphorous's 3 is 6, so we'll have a +6 charge from the P and a -6 charge form the O. To do that, we'll need 2 P's and 3 O's, so our formula is: P2O3.
Phosphorus-31 is the most common isotope. (Wikipedia)