Iron atoms have 26 electrons and the shell structure is 2.8. 14.2. The ground state electron configuration of ground state gaseous neutral iron is [Ar].

How many valence shells does Fe have?

Iron has 8 valence electrons.

How many shells are in F?

So for the element of FLUORINE, you already know that the atomic number tells you the number of electrons. That means there are 9 electrons in a fluorine atom. Looking at the picture, you can see there are two electrons in shell one and seven in shell two. ► More about the history and places to find fluorine.

Iron atoms do not have a full outer shell of electrons, and this makes iron very reactive. 3. An iron atom is a silver-grey colour, and so iron metal is a silver-grey colour.