Dubnium (Db) — Atomic Data, Electron Shells & Reactions

Atomic Number (Z) 105 IUPAC Symbol Db Standard Atomic Weight 268 g/mol Period / Group / Block 7 / 5 / d-block Condensed Electron Config [Rn] 5f14 6d3 7s2 Full Subshell Config 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d10 5f14 6s2 6p6 6d3 7s2 Principal Shell Occupancy [2, 8, 18, 32, 32, 11, 2] Pauling Electronegativity — First Ionization Energy 665 kJ/mol Covalent Radius 149 pm Melting Point — Boiling Point — Density 29.3 g/cm³ Oxidation States +5