Radium can combine with elements that have 6 valence electrons. Radium is located in Alkaline-earth metal and also, it is a metal.
Element name: Radium Element Symbol: Ra Number of proton: 88 Number of neutron: 13 Number of electron: 88 Atomic number: 88 Atomic Mass: 226 Energy Level: 7 Valence Electron: 2 Type of Ion: Cation