Silver is extracted from the anode waste sludges of electrolytic copper-refining. Isotopes: Silver has 35 isotopes whose half-lives are known, with mass numbers 94 to 128. Naturally occurring silver is a mixture of its two stable isotopes, 107 Ag and 109 Ag with natural abundances of 51.8% and 48.2% respectively. Mass number and isotopic mass. The mass number gives an estimate of the isotopic mass measured in atomic mass units (u). For 12 C, the isotopic mass is exactly 12, since the atomic mass unit is defined as 1/12 of the mass of 12 C. For other isotopes, the isotopic mass is usually within 0.1 u of the mass number. For example, 35 Cl (17 protons.

Mass Numbers - How to find Mass Numbers
The mass number is established by rounding the atomic weight to the nearest whole number. The Periodic Table with Atomic Masswill give you the atomic weight, or atomic mass, of the elements. The chemical properties of an element are determined by its Atomic Number not its Mass Number which is why atomic numbers are shown on the Periodic table whilst Mass Numbers are not. Mass numbers equal the total number of heavy, or massive, particles in the nucleus. Subtracting the Atomic number from the Mass Number equals the number of neutrons in the nucleus.

Mass Numbers = Atomic Weight of Element, rounded to nearest whole number

Number of Neutrons = Mass Number - Atomic Number

Mass Numbers

Mass Numbers - The Mass Numbers of all of the elements
So, if we know the number of protons and neutrons in an atom we can determine the mass number. The unique chart below has been created by www.elementalmatter.info and details all of the elements in the Periodic table, the numbers of protons, the numbers of neutrons and the mass numbers of atoms which relate to the elements.

Mass numbers - Examples of Mass Numbers
The following examples provide details of how to calculate the mass number.

• Example 1 - mass number of Gold: The element Gold (Symbol Au) has the Atomic Number of 79. The number of protons in atom of gold is therefore 79. Gold has the Atomic Mass weight of 196.97. Round to the nearest whole number. The mass number of gold is therefore 197.
• Example 2 - mass number of Silver: The element Silver (Symbol Ag) has the Atomic Number of 47. The number of protons in atom of silver is therefore 47. Silver has the Atomic Mass weight of 107.87. Round to the nearest whole number. The mass number of silver is therefore 108.
• Example 3 - mass number of Neon: The element Neon (Symbol Ne) has the Atomic Number of 10. The number of protons in atom of neon is therefore 10. Neon has the Atomic Mass weight of 20.18. Round to the nearest whole number. The mass number of neon is therefore 20.

Mass Numbers = Atomic Weight of Element, rounded to nearest whole number

Mass numbers - Chart of Mass Numbers
The details all of the elements in the Periodic table, the numbers of protons, the numbers of neutrons and the mass numbers of atoms which relate to the elements in the Periodic Table.

Chart of Mass Numbers

Chart of Mass Numbers

Element Silver - Ag

Comprehensive data on the chemical element Silver is provided on this page; including scores of properties, element names in many languages, most known nuclides of Silver. 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.

Silver Menu

• Silver Page One
• Silver Page Two
• Silver Page Three

How Many Protons Are In Silver

Overview of Silver

• Atomic Number: 47
• Group: 11
• Period: 5
• Series: Transition Metals

Silver Mass Number And Atomic Number

Silver's Name in Other Languages

• Latin: Argentum
• Czech: Stříbro
• Croatian: Srebro
• French: Argent
• German: Silber - s
• Italian: Argento
• Norwegian: Sølv
• Portuguese: Prata
• Russian: Серебро
• Spanish: Plata
• Swedish: Silver

Atomic Structure of Silver

• Atomic Radius: 1.75Å
• Atomic Volume: 10.3cm³/mol
• Covalent Radius: 1.34Å
• Cross Section (Thermal Neutron Capture)σ_a/barns: 63.6
• Crystal Structure: Cubic face centered
• Electron Configuration:

  1s² 2s²p⁶ 3s²p⁶d¹⁰ 4s²p⁶d¹⁰ 5s¹

• Electrons per Energy Level: 2,8,18,18,1

  Shell Model
  

• Ionic Radius: 1.26Å
• Filling Orbital: 4d¹⁰
• Number of Electrons (with no charge): 47
• Number of Neutrons (most common/stable nuclide): 61
• Number of Protons: 47
• Oxidation States: 1
• Valence Electrons: 4d¹⁰ 5s¹

Chemical Properties of Silver

• Electrochemical Equivalent: 4.0246g/amp-hr
• Electron Work Function: 4.26eV
• Electronegativity: 1.93 (Pauling); 1.42 (Allrod Rochow)
• Heat of Fusion: 11.3kJ/mol
• Incompatibilities:

  Acetylene, ammonia, hydrogen peroxide, bromoazide, chlorine trifluoride, ethyleneimine, oxalic acid, tartaric acid

• Ionization Potential
  • First: 7.576
  • Second: 21.49
  • Third: 34.83
• Valence Electron Potential (-eV): 11.4

Physical Properties of Silver

• Atomic Mass Average: 107.8682
• Boiling Point: 2436K 2163°C 3925°F
• Coefficient of lineal thermal expansion/K^-1: 19.2E^-6
• Conductivity

  Electrical: 0.63 10⁶/cm Ω
  Thermal: 4.29 W/cmK

• Density: 10.5g/cc @ 300K
• Description:

  Very soft and malleable silver metal. Appearance and odor vary depending upon specific compound.

• Elastic Modulus:
  • Bulk: 103.6/GPa
  • Rigidity: 30.3/GPa
  • Youngs: 82.7/GPa
• Enthalpy of Atomization: 284.5 kJ/mole @ 25°C
• Enthalpy of Fusion: 11.3 kJ/mole
• Enthalpy of Vaporization: 255.1 kJ/mole
• Flammablity Class: Non-combustible solid (except as dust)
• Freezing Point:see melting point
• Hardness Scale
  • Brinell: 24.5 MN m^-2
  • Mohs: 2.5
  • Vickers: 251 MN m^-2
• Heat of Vaporization: 250.58kJ/mol
• Melting Point: 1234K 961°C 1762°F
• Molar Volume: 10.27 cm³/mole
• Optical Reflectivity: 97%
• Physical State (at 20°C & 1atm): Solid
• Specific Heat: 0.235J/gK
• Vapor Pressure = 0.342Pa@961°C

Regulatory / Health

• CAS Number
  • 7440-22-4
• RTECS: VW3500000
• NFPA 704
  • Health: 1
  • Fire: 2
  • Reactivity:
  • Special Hazard:
• OSHAPermissible Exposure Limit (PEL)
  • TWA: 0.01 mg/m³
• OSHA PEL Vacated 1989
  • TWA: 0.01 mg/m³
• NIOSHRecommended Exposure Limit (REL)
  • TWA: 0.01 mg/m³
  • IDLH: 10 mg/m³
• Routes of Exposure: Inhalation; Ingestion; Skin and/or eye contact
• Target Organs: Nasal septum, skin, eyes
• 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: <0.003
  • Bone/p.p.m: 0.01-0.44
  • Liver/p.p.m: 0.005-0.25
  • Muscle/p.p.m: 0.009-0.28
  • Daily Dietary Intake: 0.0014-0.08 mg
  • Total Mass In Avg. 70kg human: 2 mg

Who / Where / When / How

• Discoverer: Known to ancient civilization
• Discovery Location: Unknown
• Discovery Year: Unknown
• Name Origin:

  Latin argentum (silver). Silver from Anglo-Saxon seolfor for silver.

• Abundance of Silver:
  • Earth's Crust/p.p.m.: 0.07
  • Seawater/p.p.m.:
    • Atlantic Suface: N/A
    • Atlantic Deep: N/A
    • Pacific Surface: 0.0000001
    • Pacific Deep: 0.0000024
  • Atmosphere/p.p.m.: N/A
  • Sun (Relative to H=1E¹²): 7.1
• Sources of Silver:

  Found in ores called argentite (AgS), light ruby silver (Ag₃ AsS₃), dark ruby silver (Ag₃SbS₃) and brittle silver. Silver is often obtained as a by-product of refining other metals like copper and gold. World wide production is around 9950 tons per year. Primary mining areas are Mexico, Bolivia, Honduras, Canada, USA.

• Uses of Silver:

  Used in alloys for jewelry, in many compounds, photographic film and paper electronics, mirrors and batteries.

• Additional Notes:

Silver Menu

• Silver Page One
• Silver Page Two
• Silver Page Three

References

Twixtor pro for mac. 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

• 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.

Silver Periodic Table Mass Number

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