Final answer:
Alkaline earth metals, located in Group 2 of the periodic table, have two electrons in their outer shell, conduct electricity, and are reactive but less so than alkali metals.
Step-by-step explanation:
The properties of alkaline earth metals include the fact that they have two electrons in their outermost shell (specifically in the s subshell), and they can conduct electricity. These metals, which include beryllium, magnesium, calcium, strontium, barium, and radium, are found in Group 2 of the periodic table.
They are reactive, but they are not more reactive than alkali metals; in fact, alkali metals are more reactive. This reactivity is due to the arrangement of their electrons and ionization energies. Alkaline earth metals readily lose both valence electrons to form compounds with an oxidation state of 2+.