chlorine
KCl
AgCl
MgCl2 is the correct formula, or two atoms of Cl for each 1 atom of Mg. You could also say 2 moles of Cl atoms for every 1 mole of Mg atoms. The empirical formula should be written with the subscripts in lowest whole number terms. Note that this formula is consistent with the fact that an Mg cation is Mg+2 and a Cl anion is Cl-1. Given these charges, a formula of MgCl2 is the one with the smallest whole number subscripts that will allow the charge of the compound to be zero. See related question below for more details on how to find empirical formulas.
The empirical formula for CaCl2 is CaCl2...you cannot simplify it any furthur.
It is an empirical formula.
This compound is potassium oxide, K2O.
An empirical formula refers to the chemical formula that indicates the simplest ratio of atoms in a compound. Two different compounds may have the same empirical formula.
A formula unit is an empirical formula.
A formula unit is an empirical formula.
An empirical formula has no data about the structure of a compound.
CH will be the empirical formula and C12H12 will be the molecular formula
The empirical formula of water is H2O.