Atomic mass: 63.546 u
Copper: Element Overview
Basic Information
- Symbol: Cu
- Atomic Number: 29
- Atomic Weight: 63.546 u
- Element Category: Transition metal
- Group: 11
- Period: 4
Physical Properties
- Phase at Room Temperature: Solid
- Melting Point: 1084.62 °C (1984.32 °F)
- Boiling Point: 2562 °C (4643.6 °F)
- Density: 8.96 g/cm³ at 20 °C
- Color: Reddish-brown, lustrous
- Crystal Structure: Face-centered cubic (fcc)
Chemical Properties
- Electronegativity: 1.90 (Pauling scale)
- Ionization Energies:
- First: 745.5 kJ/mol
- Second: 1957.9 kJ/mol
- Third: 3555 kJ/mol
- Oxidation States: +1, +2 (most common)
- Reactivity: Reacts slowly with atmospheric oxygen to form a layer of brown-black copper oxide. Further exposure can form greenish carbonate called patina.
Isotopes
- Stable Isotopes: Copper has two stable isotopes: Cu-63 and Cu-65.
- Cu-63: 69.15%
- Cu-65: 30.85%
- Radioisotopes: Several radioisotopes, including Cu-64, which is used in medical applications.
Occurrence and Production
- Natural Abundance: Copper is the 25th most abundant element in the Earth’s crust.
- Sources: Found in minerals such as chalcopyrite (CuFeS₂), bornite (Cu₅FeS₄), and malachite (Cu₂(CO₃)(OH)₂).
- Production: Primarily extracted through mining and refining processes. Pyrometallurgy and hydrometallurgy are common methods.
Uses and Applications
- Electrical Wiring: Widely used due to its excellent electrical conductivity.
- Plumbing: Commonly used in plumbing due to its corrosion resistance and malleability.
- Coins: Used in coinage, often as an alloy with other metals.
- Alloys: Forms important alloys such as bronze (copper and tin) and brass (copper and zinc).
- Electronics: Used in various electronic components and circuits.
- Heat Exchangers: Employed in heat exchangers and heat sinks due to its high thermal conductivity.
- Art and Architecture: Used in sculptures, decorative items, and architectural elements.
Safety and Precautions
- Reactivity: Copper is generally stable but can form toxic compounds.
- Handling: Copper dust and fumes should be handled with care to avoid inhalation and skin contact.
- Toxicity: While essential in small amounts, excessive exposure to copper can lead to toxicity, causing gastrointestinal distress and other health issues.
Biological Role
- Essential Element: Copper is vital for all living organisms.
- Enzyme Function: Plays a crucial role in the functioning of various enzymes, including those involved in energy production and iron metabolism.
- Health: Required for the formation of red blood cells, immune system function, and maintaining healthy bones and nerves.
Historical Background
- Discovery and Use: Known to ancient civilizations; evidence of copper use dates back to around 8000 BCE.
- Naming: The name “copper” comes from the Old English word “coper,” derived from the Latin “cuprum,” named after Cyprus, where copper was mined in ancient times.
Interesting Facts
- Patina: The green patina that forms on copper over time, such as on the Statue of Liberty, is a protective layer that prevents further corrosion.
- Copper Age: The period in human history known as the Copper Age (Chalcolithic) marks the transition from the Neolithic to the Bronze Age.
- Recyclability: Copper is 100% recyclable without any loss of quality, making it an environmentally friendly material.
Summary
Copper is a versatile transition metal known for its excellent electrical and thermal conductivity, corrosion resistance, and malleability. It is used extensively in electrical wiring, plumbing, coinage, and various alloys. Discovered in ancient times, copper continues to play a crucial role in modern technology and industry. Essential for biological functions, copper is required in trace amounts for human health. Its recyclability and durability make it a valuable and sustainable material.
Questions and Answers about Copper:
Q: What is the chemical symbol for Copper?
- A: Cu
Q: What is the atomic number of Copper?
- A: 29
Q: What type of element is Copper?
- A: Transition metal
Q: What is the atomic weight of Copper?
- A: 63.546 u
Q: What group is Copper in?
- A: Group 11
Q: What period is Copper in?
- A: Period 4
Q: What is the phase of Copper at room temperature?
- A: Solid
Q: What is the melting point of Copper?
- A: 1084.62 °C (1984.32 °F)
Q: What is the boiling point of Copper?
- A: 2562 °C (4643.6 °F)
Q: What is the density of Copper at 20 °C?
- A: 8.96 g/cm³
Q: What is the color of Copper metal?
- A: Reddish-brown, lustrous
Q: What is the crystal structure of Copper?
- A: Face-centered cubic (fcc)
Q: What is the electronegativity of Copper?
- A: 1.90 (Pauling scale)
Q: What is the first ionization energy of Copper?
- A: 745.5 kJ/mol
Q: How many stable isotopes does Copper have?
- A: Two (Cu-63, Cu-65)
Q: What is the most abundant isotope of Copper?
- A: Cu-63
Q: How is Copper commercially produced?
- A: Through mining and refining processes using pyrometallurgy and hydrometallurgy
Q: What is the natural abundance of Copper in the Earth’s crust?
- A: 25th most abundant element
Q: What common minerals contain Copper?
- A: Chalcopyrite (CuFeS₂), bornite (Cu₅FeS₄), malachite (Cu₂(CO₃)(OH)₂)
Q: What industry uses Copper extensively for electrical wiring?
- A: Electrical industry
Q: What is one use of Copper in the plumbing industry?
- A: Used in pipes and fittings due to its corrosion resistance and malleability
Q: What role does Copper play in coinage?
- A: Used to make coins, often as an alloy with other metals
Q: Why is Copper used in heat exchangers?
- A: Due to its high thermal conductivity
Q: What is the biological role of Copper in the body?
- A: Essential for enzyme function, red blood cell formation, and maintaining healthy bones and nerves
Q: What is the historical significance of Copper?
- A: Known to ancient civilizations and used since around 8000 BCE
Q: What is the origin of the name “Copper”?
- A: From the Old English “coper,” derived from the Latin “cuprum,” named after Cyprus
Q: What property makes Copper resistant to corrosion?
- A: Forms a protective oxide layer that prevents further oxidation
Q: What health hazard is associated with excessive exposure to Copper?
- A: Can cause gastrointestinal distress and other health issues
Q: How should Copper and its compounds be handled?
- A: With care to avoid inhalation and skin contact
Q: What is the second ionization energy of Copper?
- A: 1957.9 kJ/mol
Q: What is the third ionization energy of Copper?
- A: 3555 kJ/mol
Q: Is Copper essential for plant health?
- A: Yes, it is essential for plant growth
Q: What is the significance of Copper in enzyme function?
- A: Plays a crucial role in the functioning of various enzymes
Q: What is the role of Copper in the production of bronze?
- A: Combined with tin to make the alloy bronze
Q: How does Copper benefit the electronics industry?
- A: Used in electronic components due to its conductivity
Q: What is the use of Copper in art and architecture?
- A: Used in sculptures, decorative items, and architectural elements
Q: What is the role of Copper in the production of brass?
- A: Combined with zinc to make the alloy brass
Q: How does Copper contribute to the production of medical devices?
- A: Used in various medical devices due to its antimicrobial properties
Q: What is the environmental impact of Copper mining?
- A: Can cause environmental damage if not managed properly, but copper is also highly recyclable
Q: What color are Copper compounds typically?
- A: They can exhibit a variety of colors, with green and blue being common for oxidized compounds
