![]() ![]() The anion will take the suffix -ide, which means that the name of the compound will be cesium fluoride. These materials find few technical applications as well as occurring in the mineral kingdom. Construct the formula one of each ion is needed. In the first compound, the iron ion has a 2+ charge because there are two Cl ions in the formula (1 charge on each. If you have a polyatomic ion, use the Common Ion table to find. When naming a formula for an ionic compound whose cation can have more than one possible charge, you must first determine the charge on the cation before identifying its correct name. Write the symbol and charge for the non-metal. Several related materials are known, including four polymorphs of FePO 4 and two polymorphs of the dihydrate FePO 4 The charge is the Roman Numeral in parentheses. To name the compound, start with the name of the cation, cesium. Iron (III) phosphate, also ferric phosphate, 4 5 is the inorganic compound with the formula Fe PO 4. This means that the chemical formula for this ionic compound is #"CsF"#. Fluorine accepts one electron, so it form #1-# anions, #"F"^(-)#. Since cesium donates one electron, it forms #1+# cations, #"Cs"^(+)#. An ionic hydrate is an ionic compound that has water molecules trapped within its crystal lattice (refer to the index/glossary of your textbook for more. The halogen located in period 2 is fluorine, #"F"#, which means that the ionic compound will contain cesium and fluorine. This should tell you that you're dealing with the group 1 element located in period #color(red)(6)#.Ī quick look in the periodic table will reveal that this element is cesium, #"Cs"#. Notice that the element located in group 1 donates a #color(red)(6)s^1# electron. This is the case because the element located in group 1 is said to donate an electron to an element located in group 17, i.e. Writing formula for ionic compounds Write out the ions: Cation on the left, anion on the right. So, the first important thing to notice here is that this reaction will produce an ionic compound. Finally, the proper formula for an ionic compound always has a net zero charge, meaning the total positive charge must equal the total negative charge. This question can be answered by carefully inspecting the periodic table, so make sure that you have one near by.
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