Classification:Alkaline Earth.

With atomic number 88, it has four natural isotopes of atomic weight 228, 226, 224 and 223 - though there are a remarkable 21 more artificial isotopes. Chemical symbol for Radium is Ra. The chemical symbol for Radium is Ra . Atomic weight of Radium is 226 u or g/mol. Number of Neutrons:138. Name: Radium: Symbol: Ra: Atomic Number: 88: Atomic Mass: 226.0 atomic mass units Number of Protons: 88: Number of Neutrons: 138: Number of Electrons: 88: Melting Point Radium (Ra) Atomic Data for Radium (Ra) Atomic Number = 88 Atomic Weight = 226.0254 Reference E95 The chemical symbol for Radium is Ra. Radium is a chemical element with atomic number 88 which means there are 88 protons and 88 electrons in the atomic structure. Melting point of … A later starring role for radium would be as the source of alpha particles - helium nuclei - used by Rutherford in 1909 at the Cavendish laboratory in Cambridge to fire at a thin gold foil. Symbol:Ra. Melting Point:700.0 °C (973.15 K, 1292.0 °F) Boiling Point:1737.0 °C (2010.15 K, 3158.6 °F) Number of Protons/Electrons:88. Atomic Number of Radium Radium is a chemical element with atomic number 88 which means there are 88 protons and 88 electrons in the atomic structure. Atomic Mass:(226.0) amu. Number of Energy Levels: 7: First Energy Level: 2: Second Energy Level: 8: Third Energy Level: 18: Fourth Energy Level: 32: Fifth Energy Level: 18: Sixth Energy Level: Number of protons in Radium is 88. Atomic Number of Radium is 88. Name:Radium. One gram of radium-226 undergoes 3.7 × 10 10 disintegrations per second, a level of activity that defined the curie (Ci), an early unit of radioactivity. Atomic Number:88. Atomic Number of Radium.