The Periodic Table
All About The periodic Table
The Alkali metals increase in reactivity going from top to bottom. The Alkaline Earth metals are denser and harder than others. Halogens are nonmetals. Noble Gasses are seperate and can combine together. Transition Metals have higher melting points than representative elements, Lathanide Elements are also called rare earth metals. Actinide Elements are radioactive and are the most synthetic.