IDENTIFICATION AND USE: Bromine pentafluoride (BrF5) is a liquid with a sharp penetrating odor. Here both elements are ions (an anion which has a negative charge and a cation which has a positive charge). The prefix mono is never used for naming the first element of a compound. The binary compound list is mentioned in the table below. Even though each ion is really a molecule with a charge, oppositely charged polyatomic ions attract each other as ions do, making the compound an ionic salt. There are many exceptions. c. Give the total number of electrons in each compound. We'll draw single bonds between the atoms for a total of 5 single bonds, so 10 valence electrons. Binary Ionic Compound. Show the Lewis structure of each substance you classified as molecular.For ionic compounds, write charges on the cation and anion. Remember, it's only the final o or a.So, the name of ClO 2 will be chlorine dioxide, and no vowels are dropped. To decide if a binary compound has ionic or covalent bonding, first locate the two elements concerned in the Periodic Table and decide if they are metals (shown in blue) or non-metals (shown in pink). If the difference is greater, the bond will have an ionic character. Binary ionic compounds are salts which consist of only 2 elements. Rules for Binary Covalent Compounds . For BrF5, we have a total of 42 valence electrons. This means that the electrons will be taken from the less electronegative element, and spend all of their time orbiting the more electronegative element. Metal chlorides, bromides, and iodides are converted to fluorides by treatment with BrF5. Boron trifluoride has covalent bonds. It is an ionic compound. The name is diphosphorus pentoxide. The 'first name' is phosphorus. How to identify if a substance contains ionic or covalent bonds. We give the numbers of each atom: di (=2) phosphorus penta (=5) oxide, which means: 2 phosphorus together with 5 oxygen The 'a' of 'penta' is omitted when it comes before 'o' as in 'oxide'. Binary compounds with oxygen in them have 'oxide' as a 'last name'. 2. ; The final o or a of a prefix is often dropped when the element begins with a vowel. The coordination around the Cl atom is extended by two highly ionic, long fluorine bridges to neighboring fluoridometallate anions, resulting in a total coordination number of six. Transcript: This is the BrF5 Lewis structure. Bromine is the least electronegative, we'll put that in the center and then we'll put 5 Fluorines around the outside. 1. a. Classify each of the following as molecular, ionic or other. If they are both non-metals (such as carbon and oxygen) they will form a covalent … d. Start studying Ionic vs. Covalent Compounds. As with most things, this is not an absolute rule. 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