Atomic Element Z = 29 • Transition Metal

Copper (Cu) — Atomic Data, Electron Shells & Reactions

Copper (symbol Cu, atomic number 29) has a standard atomic weight of 63.546 u and ground-state configuration [Ar] 3d10 4s1.

← 28 Ni Full Atlas 30 Zn →

IUPAC Physical & Atomic Properties

Atomic Number (Z) 29 IUPAC Symbol Cu Standard Atomic Weight 63.546 g/mol Period / Group / Block 4 / 11 / d-block Condensed Electron Config [Ar] 3d10 4s1 Full Subshell Config 1s2 2s2 2p6 3s2 3p6 3d10 4s1 Principal Shell Occupancy [2, 8, 18, 1] Pauling Electronegativity 1.9 First Ionization Energy 745 kJ/mol Covalent Radius 132 pm Melting Point 1357.77 K (1084.62 °C) Boiling Point 2835 K (2561.85 °C) Density 8.96 g/cm³ Oxidation States +2, +1

Bohr Shell Diagram & Balanced Reactions

Cu (Z=29) — Valence shell highlighted in vermilion

Interactive Stoichiometry Reactions Involving Copper:

Cu + HNO3 -> Cu(NO3)2 + NO + H2O