Ionic Compound Practice Substances resulting from the chemical combination of two or more elements in fixed proportions are called compounds. Most elements do not exist in their free native state but are in the combinations of two or more elements as chemical compounds.
Go check out the tutorial for those links to the right of this page. The first word is the name of the cation the first ion and the second word is the name of the anion the second one. The cation is the first thing in the chemical formula. If the cation is a metal, write down the name of the metal.
The anion is the second thing in the chemical formula. A polyatomic ion is just a fancy way of referring to an ion that has more than one atom in it, like the nitrate ion NO3- or the sulfate ion SO ion.
In the case of polyatomic ions, just write down the names of the ions by consulting either a chart that tells you what they are or your brain if your teacher is making you memorize them. Are we done yet? Like all people, you love the fresh, crisp flavor of Fresca.
Transition metal cations need Roman numerals. Pb, Sn, and Bi, which do require Roman numerals.
What is a Roman numeral? Move to Step 3 to find out… Step 3: Finishing the formula with a Roman numeral If the rules above have told you that you need a Roman numeral, then congratulations!
If they say that you did not need a Roman numeral, please stop reading. Your formula is finished and adding a Roman numeral will actually make it wrong. The Roman numerals in formulas indicate the amount of positive charge on a cation.
The reason some cations need this and some do not is that some cations can have more than one possible charge. How do we find the right one? Use the steps below to figure it out: Find out how many cations you have. This is the number written as a subscript below the formula of the cation.
For example, FeF2 has one iron atom, while Cu2O has two copper atoms. Find out how many anions you have. If your anion is an element, this is the number written as a subscript below its formula.
Find out the charge on the anion. If the anion is an element, just count on the periodic table to the next noble gas for example, Cl is one away from Ar, giving it a charge of The Roman numeral for this compound is found by using the numbers we found in this equation: Other examples to test your prowess: Fresca is a registered trademark of the Coca-Cola Company.
The Coca-Cola Company neither sponsors nor endorses this website or anything included herein. I, on the other hand, would like to tell you that I think Fresca is an absolutely fantastic product. You can practice learning the Roman numerals by watching Super Bowl reruns or by getting a really old wristwatch.
Or by taking Latin, which has become inexplicably popular lately. Me and my beautiful beard: For more information about fair use, visit this site.
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Teacher resources and professional development across the curriculum. Teacher professional development and classroom resources across the curriculum. Naming salts, binary inorganic ionic compounds, using IUPAC recommendations introductory tutorial for chemistry students.
This item test will measure how well you understood the rules in writing down the correct chemical formulas of compounds as well as naming compounds giv. The best way to learn how to name ionic compounds is to work through a few examples, referring to Figure "Naming an Ionic Compound," Table "Some Common Monatomic Ions and Their Names," Table "Common Polyatomic Ions and Their Names," and Table "Common Cations of Metals That Form More Than One Ion" as needed.
Nomenclature of Hydrated Ionic Compounds. Rules for Naming Hydrated Ionic Compounds. Hydrated ionic compounds (i.e., hydrates) have a specfic number of water molecules in their chemical formulas. In the solid, these water molecules (also called "waters of hydration") are part of the structure of the compound.