1. Cation (Metal) Name: The name of the metal (positive ion) is written first.
2. Anion (Nonmetal) Name: The name of the nonmetal (negative ion) is written second, but with the ending changed to "-ide".
Examples:
* NaCl: Sodium chloride (Sodium + Chlorine -ide)
* KBr: Potassium bromide (Potassium + Bromine -ide)
* MgO: Magnesium oxide (Magnesium + Oxygen -ide)
* CaS: Calcium sulfide (Calcium + Sulfur -ide)
Important Notes:
* Roman Numerals: If the metal can form more than one ion (like transition metals), a Roman numeral is used in parentheses after the metal name to indicate its charge. For example, FeCl₂ is Iron (II) chloride and FeCl₃ is Iron (III) chloride.
* Polyatomic Ions: The rules still apply if one or both ions are polyatomic (composed of multiple atoms). For example, (NH₄)₂SO₄ is Ammonium sulfate (Ammonium + Sulfate).
* Exceptions: There are some exceptions to the "-ide" ending, such as hydroxide (OH-), cyanide (CN-), and peroxide (O₂²⁻).
Let me know if you'd like to see more examples!
