8. How are metals Classified?
Alkali Metals-Most reactive, so reactive, not found
uncombined with other elements in nature. (Found only in
compounds) NaCl=Table Salt
Alkali Earth Metals-Harder and denser, and melt at higher
temperatures than alkali metals. Alkali metals are reactive but NOT
AS reactive as alkali metals. Also, these elements are never found by
themselves and are usually found as a part of a compound. Calcium
compounds are essential for healthy bones.