Question

The compound FeCl3 is made of
three molecules of iron chloride.
one atom of iron and three atoms of carbon.
one atom of iron and three atoms of chlorine.
two atoms of iodine, one atom of iron, and one atom of carbon.

Answer 1

One atom of iron and three atoms of chlorine.

Fe is the symbol for iron and Cl is the symbol for chlorine; the subscript 3 means there are three chlorine atoms. (FeCl3 is iron(III) chloride, often existing as ionic Fe3+ and three Cl− ions.)