Originally Posted by
Phileas Fogg;4085091
Every element can be Ion. An Ion is an element, or a molecule [for instance, NO3−) which has lost or gained one [or more
electrons then usually existed - which means they equat in numbers to the number of Protons*. Since electrons have negative electric charge, an element (or a molecule) with an additional electron will have minus above it [as NO3−), while an element or a molecule having less electrons then normal will have a plus above it.
*The numbers of the elements in the periodic table is acorrding to the number of Protons. For instance, Iron [F in the periodic table] is number 26 in atomic numbers, which means it consists 26 Protons and 26 electrons.
Hope its clear now.