Atomic Number Of Cu


Electronegativity according to Pauling. 8.9 at 20°C. Copper-65 Please visit the Copper element page for information specific to the chemical element of the periodic table. A) Au has a smaller atomic mass and fewer electrons than Cu. B) Au has the same atomic mass as Cu but a greater atomic number. C) Au has the same atomic number as Cu but a much greater atomic mass. D) Au has both a greater atomic number and a greater atomic mass than Cu. What group of elements is the least reactive?

Element Copper - Cu

Copper - Atomic Mass - Atomic Weight - Cu

Comprehensive data on the chemical element Copper is provided on this page; including scores of properties, element names in many languages, most known nuclides of Copper. Common chemical compounds are also provided for many elements. In addition technical terms are linked to their definitions and the menu contains links to related articles that are a great aid in one's studies.

Copper Menu

  • Copper Page One
  • Copper Page Two
  • Copper Page Three

Overview of Copper

  • Atomic Number: 29
  • Group: 11
  • Period: 4
  • Series: Transition Metals

Copper's Name in Other Languages

  • Latin: Cuprum
  • Czech: Měd´
  • Croatian: Bakar
  • French: Cuivre
  • German: Kupfer - e
  • Italian: Rame
  • Norwegian: Kobber
  • Portuguese: Cobre
  • Russian: Медь
  • Spanish: Cobre
  • Swedish: Koppar

Atomic Structure of Copper

  • Atomic Radius: 1.57Å
  • Atomic Volume: 7.1cm3/mol
  • Covalent Radius: 1.17Å
  • Cross Section (Thermal Neutron Capture)σa/barns: 3.78
  • Crystal Structure: Cubic face centered
  • Electron Configuration:
    1s2 2s2p6 3s2p6d10 4s1
  • Electrons per Energy Level: 2,8,18,1
    Shell Model
  • Ionic Radius: 0.73Å
  • Filling Orbital: 3d10
  • Number of Electrons (with no charge): 29
  • Number of Neutrons (most common/stable nuclide): 35
  • Number of Protons: 29
  • Oxidation States:2,1
  • Valence Electrons: 3d10 4s1

Chemical Properties of Copper

  • Electrochemical Equivalent: 1.1855g/amp-hr
  • Electron Work Function: 4.65eV
  • Electronegativity: 1.9 (Pauling); 1.75 (Allrod Rochow)
  • Heat of Fusion: 13.05kJ/mol
  • Incompatibilities:
    Oxidizers, alkalis, sodium azide, acetylene
  • Ionization Potential
    • First: 7.726
    • Second: 20.292
    • Third: 36.83
  • Valence Electron Potential (-eV): 34

Physical Properties of Copper

  • Atomic Mass Average: 63.546
  • Boiling Point: 2840K 2567°C 4653°F
  • Coefficient of lineal thermal expansion/K-1: 16.5E-6
  • Conductivity
    Electrical: 0.596 106/cm Ω
    Thermal: 4.01 W/cmK
  • Density: 8.96g/cc @ 300K
  • Description:
    Reddish orange transition metal.
  • Elastic Modulus:
    • Bulk: 137.8/GPa
    • Rigidity: 48.3/GPa
    • Youngs: 129.8/GPa
  • Enthalpy of Atomization: 338.9 kJ/mole @ 25°C
  • Enthalpy of Fusion: 13.01 kJ/mole
  • Enthalpy of Vaporization: 304.6 kJ/mole
  • Flammablity Class: Non-combustible solid (except as dust)
  • Freezing Point:see melting point
  • Hardness Scale
    • Brinell: 874 MN m-2
    • Mohs: 3
    • Vickers: 369 MN m-2
  • Heat of Vaporization: 300.3kJ/mol
  • Melting Point: 1357.75K 1084.6°C 1984.3°F
  • Molar Volume: 7.11 cm3/mole
  • Optical Reflectivity: 90%
  • Physical State (at 20°C & 1atm): Solid
  • Specific Heat: 0.38J/gK
  • Vapor Pressure = [email protected]°C

Regulatory / Health

  • CAS Number
    • 7440-50-8
  • RTECS: GL5325000
  • NFPA 704
    • Health: 2
    • Fire:
    • Reactivity:
    • Special Hazard:
  • OSHAPermissible Exposure Limit (PEL)
    • TWA: 1 mg/m3
  • OSHA PEL Vacated 1989
    • TWA: 1 mg/m3
  • NIOSHRecommended Exposure Limit (REL)
    • TWA: 1 mg/m3
    • IDLH: 100 mg/m3
  • Routes of Exposure: Inhalation; Ingestion; Skin and/or eye contact
  • Target Organs: Eyes, skin, respiratory system, liver, kidneys (increase(d) risk with Wilson's disease)
  • Levels In Humans:
    Note: this data represents naturally occuring levels of elements in the typical human, it DOES NOT represent recommended daily allowances.
    • Blood/mg dm-3: 1.01
    • Bone/p.p.m: 1-26
    • Liver/p.p.m: 30
    • Muscle/p.p.m: 10
    • Daily Dietary Intake: 0.50-6 mg
    • Total Mass In Avg. 70kg human: 72 mg
Atomic Number Of Cu

Who / Where / When / How

  • Discoverer: Known to ancient civilization
  • Discovery Location: Unknown
  • Discovery Year: Unknown
  • Name Origin:
    Latin: cyprium (island of Cyprus famed for its copper mines).
  • Abundance of Copper:
    • Earth's Crust/p.p.m.: 50
    • Seawater/p.p.m.:
      • Atlantic Suface: 0.00008
      • Atlantic Deep: 0.00012
      • Pacific Surface: 0.00008
      • Pacific Deep: 0.00028
    • Atmosphere/p.p.m.: N/A
    • Sun (Relative to H=1E12): 1.15
  • Sources of Copper:
    Pure copper occurs rarely in nature. Usually copper found in such minerals as azurite, malachite and bornite and in sulfides as in chalcopyrite (CuFeS2), coveline (CuS), chalcosine (Cu2S) or oxides like cuprite (Cu2O). Copper is obtained by smelting, leaching and by electrolysis. Annual world production is around 6,540,000 tons. Primary mining areas are in USA, Zaire, Zambia, Canada, Chile, Cyprus, Russia and Australia.
  • Uses of Copper:
    Most often used as an electrical conductor. Its alloys are used in jewelry, bronze sculptures and for coins. The skin of the Statue of Liberty is made of copper.
  • Additional Notes:
    Copper is a very interesting element. It is one of the transition elements that actually uses electrons from one of the inner orbitals in chemical reactions. In addition, it has more than one oxidation state. Like many of the transition elements, copper has a colored ion. Copper typically forms a bluish green solution. Copper (Cu) has two valences Cu I (cuprous) has one valence electron and Cu II (cupric) has two valence electrons. Copper was one of the earliest known metals, having reportedly been mined for over 5000 years. In nature it has two isotopes, 63 (69.09%), which has 29 electrons and protons and 34 neutrons, and 65 (30.91%), which has 29 electrons and protons and 36 neutrons. Brass and bronze are alloys of copper.
Atomic Number Of Cu

Copper Menu

  • Copper Page One
  • Copper Page Two
  • Copper Page Three


Is Copper Toxic To Humans?Copper Is Important To Good Health. However, Exposure To Higher Doses May Be Harmful. Long-term Exposure To Copper Dust May Irritate Your Nose, Mou..

A list of reference sources used to compile the data provided on our periodic table of elements can be found on the main periodic table page.

Related Resources

What Are The Main Uses Of Copper?The Primary Applications Of Copper Are In Electrical Wiring, Roofing, Plumbing, And Industrial Machinery. For Most Of These Applications, Copper Is..

  • Anatomy of the Atom
    Answers many questions regarding the structure of atoms.
  • Molarity, Molality and Normality
    Introduces stoichiometry and explains the differences between molarity, molality and normality.
  • Molar Mass Calculations and Javascript Calculator
    Molar mass calculations are explained and there is a JavaScript calculator to aid calculations.
  • Chemical Database
    This database focuses on the most common chemical compounds used in the home and industry.

Citing this page

If you need to cite this page, you can copy this text:

Atomic number of cobalt

Kenneth Barbalace. Periodic Table of Elements - Copper - Cu. 1995 - 2021. What to say for happy chinese new year. Accessed on-line: 4/24/2021

Linking to this page

If you would like to link to this page from your website, blog, etc., copy and paste this link code (in red) and modify it to suit your needs:

<a href=''>echo Periodic Table of Elements: Copper - Cu (</a>- Comprehensive information for the element Copper - Cu is provided by this page including scores of properties, element names in many languages, most known nuclides and technical terms are linked to their definitions.


What Are The Effects Of Copper On Humans?Long-term Exposure To Copper Can Cause Inflammation Of The Nose, Throat, And Eyes, Causing Headaches , Stomach Aches, Dizziness, Vomiting, And Diar..

PLEASE, if you like an article we published simply link to it on our website do not republish it.