Question

why does iron also react but but it also has 8 electrons in its outer shell?​

Answer 1

Explanation:

The eight- electrons stability of an atom is stemmed from the stability of the noble gases or the elder name inert gases, which had long been known as unreactive or noble. ... However, this rule is justified for elements of second row in the periodic table, which their outermost- shell capacity is 8 electrons.

Answer 2

u r wrong!! Iron has no eight electrons in its outer shell. see below the configuration

Fe : 26 : 1s2 2s2 2p6 3s2 3p6 4s2 3d6

Iron outer shell is 4...and contains 2 electrons only.

now it reacts because of availability of p & d orbitals