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terpconnect.umd.edu/~wbreslyn/chemistry/naming/findingioniccharge.html

How to Find the Ionic Charge for an Element. When you are working with ionic compounds (they are called ionic because they consist of ions) you'll often need to determine the ionic charge.This is especially the case when you are writing formulas based on the chemical name.

sciencing.com/calculate-charge-ion-5955179.html

Calculate the charges of polyatomic ions, or molecules with positive or negative charges, by looking at their oxidation numbers. The hydroxide ion, for example, has a -1 charge. Oxygen generally has an oxidation number of -2, while hydrogen has +1. The charge of the hydroxide ion is negative because (-2)+ (+1) = -1.

www.dummies.com/education/science/chemistry/positive-and-negative-ions-cations...

A metal reacts with a nonmetal to form an ionic bond. You can often determine the charge an ion normally has by the element’s position on the periodic table: The alkali metals (the IA elements) lose a single electron to form a cation with a 1+ charge. The alkaline earth metals (IIA elements) lose two electrons to form a 2+ cation.

sciencing.com/remember-charges-polyatomic-ions-4953.html

Ions in chemistry can be a single charged atom, or they can be a group of atoms that act as an ion. These groups of atoms are called polyatomic ions. Polyatomic ions each carry a specific charge, which is determined by their numbers of valence electrons. Many chemistry classes require students to know at least some of the basic polyatomic ions.

www.answers.com/Q/How_do_you_find_a_charge_of_an_element

An ion is an element that has lost or gained electrons, "cation - positive charge", "anion - negative charge". Gaining a charge causes the element to be more or less reactive. An isotope is an ...

www.quora.com/How-does-one-determine-the-charge-of-a-polyatomic-ion

Good question, and one I have heard frequently in teaching Freshman Chemistry. The first rule is that you memorize them. However, I have made a few observations that may help. I will share: For polyatomic ions containing oxygen and a halogen ...

www.khanacademy.org/.../introduction-to-compounds/v/introduction-to-ions

So you could write this as platinum with a plus four charge. This is a platinum ion, a positive platinum ion. The general term when we're talking about a positive ion, we're talking about a cation. That is a positive ion. Up there when we talked about boron being negative, a negative ion, that is an anion.

www.wikihow.com/Name-Ions

How to Name Ions. Naming ions is a fairly simple process when you understand the rules. The first thing to consider is if the ion is positively or negatively charged and if it is a monoatomic ion or a polyatomic ion. You also must consider...