Atomic Number
29
Element 29
Copper (Cu)
Copper is a chemical element with symbol Cu and atomic number 29. It is a soft, malleable, and ductile metal with very high thermal and electrical conductivity.
Atomic Mass
63.546 u
Category
Transition Metal
Period
4
Group
Group 11: copper group
Phase
solid
Density
8.96 g/cm3
Electron Shells
2, 8, 18, 1
Atomic Structure
Protons: 29. Electrons: 29. Neutrons: Varies by isotope.
Electron configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹ 3d¹⁰
Why Copper Matters
Copper helps connect atomic number 29, transition metal behavior, period 4 trends, and electron shell structure. Its solid phase, atomic mass of 63.546 u, and electron configuration 1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹ 3d¹⁰ make it useful for comparing bonding patterns across the periodic table.
Discovery and Occurrence
Copper was discovered Unknown. Copper is a chemical element with symbol Cu and atomic number 29. It is a soft, malleable, and ductile metal with very high thermal and electrical conductivity.
Safety and Handling Context
Copper is presented here for learning and comparison. Pure elements and laboratory compounds can have hazards that depend on dose, form, and setting.
Related Elements
Frequently Asked Questions
- What is the atomic number of Copper?
- Copper has atomic number 29, which means a neutral atom has 29 protons and 29 electrons.
- What is the chemical symbol for Copper?
- The chemical symbol for Copper is Cu.
- What category is Copper in?
- Copper is classified as a transition metal and sits in period 4 of the periodic table.
Explore Copper in 3D
Use the interactive table above to rotate atomic models, compare periodic trends, and move from Copper to neighboring elements without losing your place.