To name them, follow these quick, simple rules: Video 2.7.e: (1'28") Acid Salts 1: Youtube for naming compounds that can form from carboxylate (acid, salt and acid salt), Video 2.7.f: (3'19") Acid Salts 2: YouTube naming the compounds that can form from phosphate (acid, salt, and acid salts). 1(x) + 1(-2) = 0. So since non of the two are metals they are covalent. As we have seen in the previous section, there are two types of monatomic ions, those of elements that form only one charge state, and those that can form multiple charged states. There are five lone pairs of electrons in the molecule of SO2. On the other hand F- has a small size due to which it is tuff to polaris it, but Cl-, having a large size, is easily polarisible. It is the first and lightest element on the periodic table. Its electronegativity value is 3.98. 11K views 2 years ago To tell if SO3 (Sulfur trioxide) is ionic or covalent (also called molecular) we look at the Periodic Table that and see that S is a non-metal and O is a non-metal. [CDATA[*/{"annotations":null,"assetRoot":null,"branding":null,"clientUrl":"https://cdn.hypothes.is/hypothesis/1.38.0/build/boot.js","oauthEnabled":null,"onLayoutChange":null,"openLoginForm":null,"openSidebar":null,"query":null,"services":null,"showHighlights":"always","sidebarAppUrl":"https://hypothes.is/app.html","subFrameIdentifier":"006843288837771455","pluginClasses":{}}/*]]>*/, /**/, /**/, /**/, /**/, /*