Identify elements and charges using roman numerals, apply the octet rule to determine ion numbers, write the ionic compound formula, and match it to the letter choice on the worksheet to find the correct compound name.1. Identify the elements and their charges.Each formula on the worksheet shows two elements. The first element is always iron (Fe) or lead (Pb). The second element is oxygen (O) or hydroxide (OH). The charge of each element is indicated by a roman numeral in parentheses after the element symbol. For example, in Fe_2O_3, the iron has a charge of +3 and the oxygen has a charge of -2.2. Use the octet rule to determine the number of ions of each element.The octet rule states that atoms tend to gain or lose electrons to achieve a full outer shell of eight electrons. In ionic compounds, the metal atom loses electrons to the non-metal atom, so the charges of the ions must balance out. For example, in NaCl, the sodium atom loses one electron to the chlorine atom, so the sodium ion has a charge of +1 and the chlorine ion has a charge of -1.3. Write the formula for the ionic compound.The formula for an ionic compound is written with the metal ion first, followed by the non-metal ion. The subscript numbers indicate the number of ions of each element needed to balance the charges. For example, in Fe_2O_3, there are two iron ions (each with a charge of +3) and three oxygen ions (each with a charge of -2).4. Match the formula to the letter choice.Once you have the formula for the ionic compound, find the matching letter choice on the worksheet. The letter choice will be the one that corresponds to the correct name for the compound....

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