BohR Model Diagram:ORbital Diagram: |
Element name: Radium
Symbol: Ra Atomic Number: 88 Type: Alkali Earth Metal Phase at room temperature: Solid Density: 5.5 g/cm³ Melting Point: 700℃ Boiling Point: 1,737℃ Molar Mass: 226.03 g/mol-¹ Oxidation state: +2 Location in Periodic Table: Group 2(Alkali Earth Metal), period 7, block s Properties of Family: Shiny, silvery-white, somewhat reactive materials at room temperature, low densities and melting/boiling points. Valance Electrons: 2 Electronic Configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹º 4p⁶ 5s² 4d¹º 5p⁶ 6s² 4f¹⁴ 5d¹º 6p⁶ 7s² Noble Gas Notation: [Rn] 7s² Four quantum numbers for last electron in orbital diagram: 1. n=7 2. 𝓁=0 3. m (sub𝓁)= 0 4. m (sub s)= -½ |