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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.


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.


A summary of determining ionic charges and valence electrons. View more lessons: http://www.educreations.com/yt/2649908/?ref=ytd


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. While there are some ways of figuring out the charges on each ion, as well as tricks to remembering others, there are no solid rules on how they are ...


You cannot predict ion size as a function of charge, but you can make statements about some general trends. In general, ionic radius decreases with increasing positive charge. As the charge on the ion becomes more positive, there are fewer electrons. The ion has a smaller radius. You can see this trend in the transition metals.


The most common way to determine the ion of an atom on the periodic table is to look at the group it is in. Moving from left to right the elements will usually have the ionic charges of +1,+2,+3 ...


The charge of an ion is a result of the atom gaining or losing electrons. Determining this is the difference between the number of protons and the current number of electrons.


For polyatomic ions containing oxygen and a halogen (F, Cl, Br, I), the charge of the polyatomic ion is the same as the charge of the halide: -1. For polyatomic ions containing oxygen and a chalcogen (S, Se, Te), the charge of the polyatomic ion is the same as the charge of the chalcogen: -2.


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...