Use for questions related to molecular formula, empirical formula, formula unit, for representing info about the chemical proportions of atoms that constitute a particular chemical compound, molecule, ion, complex or other species using chemical element symbols, numbers, and sometimes also other symbols. NOT to be confused with 'structure' or 'nomenclature'.

For questions related to molecular formula, empirical formula, formula unit, representing the chemical proportions of atoms that constitute a particular chemical compound, molecule, ion, complex, crystal, etc. using chemical element symbols, numbers, and other symbols. NOT related to 'notation', 'composition', 'structure' or 'nomenclature'.

Use for questions related to molecular formula, empirical formula, formula unit, for representing info about the chemical proportions of atoms that constitute a particular chemical compound, molecule, ion, complex or other species using chemical element symbols, numbers, and sometimes also other symbols. NOT to be confused with 'structure' or 'nomenclature'.