How do u get the number of electrons and number of charges in an ion?
You need to know the number of electrons in the atom from which they are derivedA + sign ion means electrons were lost so there are now more protons and a - sign means electrons were gained eg aluminium has 13 electrons Al 3+ has 10 electrons, sulfur has 16 electrons and S 2- has 18 electronsChromium has 24 electrons and Cr +7 has 17 electrons.
