Chemical names {chemical naming} have formats.
name from formula
Chemical name comes from chemical formula. In general, write name for each symbol in formula in same sequence as in formula, in order of increasing electronegativity.
To write correct symbol names, first check formula for complex ions.
Then check for atom or ion valences or charges.
Write first atom or ion name.
If molecule is ionic, and metal ion can have more than one valence number, write metal-ion valence in roman numerals in parentheses.
For covalent molecules, if number of attached oxygens or other atoms is one, write "mono-". If two, write "di-". If three, write "tri-". If four, write "tetra-". If five, write "penta-". If six, write "hexa-".
If molecule is ionic, write second-ion root. If molecule is covalent, write root of atom with attached oxygens or other atoms.
Always add "-ide" to root.
For example, the ionic compound FeCl2 [2 is subscript] is iron (II) chloride. The covalent compound SO2 [2 is subscript] is sulfur dioxide.
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Date Modified: 2022.0224