Copper

Atomic symbol: Cu
Atomic number: 29
Atomic mass: 63.55

Appearance: Red-orange solid at 25°C

Group: 10
Period: 4
Series: Transition metals
Block: d
Electron configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s¹

Slowly reacts with water and oxygen to give a greenish rust: this is why the Statue of Liberty looks green.

2nd highest electrical conductivity of all elements after silver.

Fun Fact! Copper is one of the first metals to be discovered by humans, with records of its use tracing back to before 8,000 BC.