Chlorine and iodine are both elements that form diatomic molecules (molecules that consist of two atoms). One atom of chlorine is symbolised by Cl; however, single atoms of chlorine do not exist unattached to other atoms. One molecule of chlorine is Cl2. The situation is the somewhat similar for iodine, and a molecule of iodine is I2. Please see the links.
Fe23
CaCl2
iodine has lower electronegativity than chlorine
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.
chlorine
The rubidium iodide is RbI.
CCl4
BaCl2
BaCl2
Fe23
CaCl2
ch3cl apex
It is an empirical formula.
FeCl3
As an element iodine is 'I2' and calcium is 'Ca'. However, in combination it CaI2 ( Calcium Iodide.
iodine has lower electronegativity than chlorine