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b. a compound made up of only nonmetals c. a compound made up of hydrogen and either a nonmetal or a polyatomic anion d. a compound made up of only metals e. a compound made up of only polyatomic ions Metals vs. Non-Metals: Dot Diagrams; Ions Lesson Planet In this metals, non-metals, dot diagrams and ions worksheet, students read about each of these topics and they identify if 8 elements are metals or non-metals, they draw electron dot diagrams for 5 elements, they write the charge of 3... Anions and cations. "Anion" redirects here. It is not to be confused with the quasiparticle Anyon . Cations and anions are measured by their ionic radius and they differ in relative size: "Cations are...Cations which are "positively charged ions" and the anions which are "negatively charged ions" are formed when a nonmetal gains Magnesium is a metal so it would lose an electron to form an anion.If only nonmetals are involved, the bond is considered polar covalent. Here is an example: Sodium bromide (formula = NaBr; ENNa = 0.9, ENBr = 2.8) has a DEN = 1.9.Anion Names and Formulas. Metallic atoms hold some of their electrons relatively loosely, and as a The monatomic anions are named by adding -ide to the root of the name of the nonmetal that forms...Second, is it ionic? No, both elements are non-metals, so use the prefixes. Name the first element: Nitrogen Name the second element: Oxygen Remove the ending of Oxygen, and replace it with "ide": Oxide Two non-metals: Add prefix to Nitrogen: Dinitrogen Add the prefix to Oxide: Pentaoxide (there are five oxygen atoms, therefore the prefix is "penta") Anions and cations. "Anion" redirects here. It is not to be confused with the quasiparticle Anyon . Cations and anions are measured by their ionic radius and they differ in relative size: "Cations are...An ingenious molecular structure is designed to realize the "cation-anion regulation" with strong interactions between adsorption sites and ions at the molecular level.For example, iron(III) iodide, FeI 3, is composed of iron ions, Fe 3+ (elemental iron is a metal), and iodide ions, I-(elemental iodine is a nonmetal). Rule 1. The positive ion (cation) is written first in the name; the negative ion (anion) is written second in the name. Rule 2.