Here's why:

* Alkaline earth metals are a group of elements located in the second column of the periodic table. They are characterized by having two valence electrons (electrons in the outermost shell) and being highly reactive.

* Iron is a transition metal, found in the middle of the periodic table. It has multiple valence electrons and is known for its magnetic properties.

Here are the alkaline earth metals:

* Beryllium (Be)

* Magnesium (Mg)

* Calcium (Ca)

* Strontium (Sr)

* Barium (Ba)

* Radium (Ra)