What is Cu? Essential Knowledge about Cu.

Definition of Cu (Copper)
1.1 Common name: Copper
1.1.2 English name: Copper
1.2 Atomic mass: 63.546 (3) u
1.3 Atomic weight: 63.55
1.3.1 Molecular structure: Copper exists as single atoms.
1.4 Ion structure: Copper can form Cu₂+ and Cu+ ions.

Properties of Cu
2.1 Physical properties of Cu
State: Solid at room temperature
Color: Reddish-brown
Odor: Odorless
pH: Not applicable
2.2 Chemical properties of Cu: Cu can react with oxygen, strong acids, and salts of other metals.

Common chemical equations involving Cu
3.1 Metal reaction: Cu + O₂ -> CuO
3.2 Acid reaction: Cu + Concentrated -> , hot H₂SO₄ → CuSO₄ + SO₂↑ -> + H₂O
3.3 Non-metal reaction: Cu + Cl₂ -> CuCl₂
3.4 Reaction with salt: Cu + FeSO₄ -> CuSO₄ + Fe

Preparation of Cu
4.1 Laboratory preparation of Cu: Cu can be prepared from the reaction between copper(II) oxide and hydrogen gas: CuO + H₂ -> Cu + H₂O
4.2 Industrial preparation of Cu: Industrially, copper is prepared from chalcopyrite ore (CuFeS₂) through a process of heat treatment, then refined using electrolysis.