Wks 7.1 Answer Key for Beginning Naming and Formula Writing
To master compound identification and equation formation, focus on understanding basic rules for molecular structures. Start with recognizing ionic and covalent bonds in compounds. For ionic compounds, the metal cation comes first, followed by the anion. For example, sodium chloride is NaCl. In covalent compounds, use prefixes to indicate the number of atoms, like carbon dioxide for CO2.
When constructing a molecular formula, ensure to balance the charges of ions in ionic compounds. If needed, use subscripts to reflect the number of atoms in each element. For example, calcium nitrate is Ca(NO3)2, indicating two nitrate ions for each calcium ion.
When naming compounds, pay attention to the type of bond and oxidation states. The oxidation state for transition metals may require Roman numerals. For example, iron(III) chloride indicates iron has a +3 charge. Non-metal elements follow simple naming conventions based on the number of atoms, like nitrogen trichloride for NCl3.
