Ra+-+Radium

media type="custom" key="3198134"media type="youtube" key="5_I6vj-lXNM" height="344" width="425" Name:Radium Symbol:RA Atomic Mass:209 Standard State:solid at 298 Group name:Alkaline earth metal Period in Periodic Table:7 Color:metallic Classification:Metallic

Radium is #88 on the periodic table of elements. The uses are paints, nuetron sources, and medical uses. It will blacken if exposed to air. It does that from nitrade. when mixed with beryllium.