Potassium Valence Electrons

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A step-by-step explanation of how to draw the KBr Lewis Dot Structure.For KBr we have an ionic compound and we need to take that into account when we draw th. Use the periodic table to identify the number of core electrons and the number of valence electrons in each case below. Potassium (K): 1s22s22p63s23p64s1 core electrons valence electrons. 1s22s22p63s23p64s1 18 core electrons 1 valance electron. Iron (Fe): Ar4s23d6 core electrons valence electrons Ar4s23d6 18 core electrons. Question: Potassium (K): 1s22s22p63s23p64s1 core electrons and valence electrons. Ask your question Login with google. Potassium (K): 1s22s22p63s23p64s1 core electrons and valence electrons. Potassium (the neutral atom) has 19 electrons. The electron valence is only one. Valence Electrons: 4s 1 Electron Dot Model. Chemical Properties of Potassium. Electrochemical Equivalent: 1.4587g/amp-hr. Potassium - K (EnvironmentalChemistry.com)- Comprehensive information for the element Potassium - K is provided by this page including scores of properties, element names in many languages, most known nuclides.

Element Potassium - K

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

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Overview of Potassium

  • Atomic Number: 19
  • Group: 1
  • Period: 4
  • Series: Alkali Metals

Potassium's Name in Other Languages

  • Latin: Kalium
  • Czech: Draslík
  • Croatian: Kalij
  • French: Potassium
  • German: Kalium - s
  • Italian: Potassio
  • Norwegian: Kalium
  • Portuguese: Potássio
  • Russian: Калий
  • Spanish: Potasio
  • Swedish: Kalium

Atomic Structure of Potassium

  • Atomic Radius: 2.77Å
  • Atomic Volume: 45.46cm3/mol
  • Covalent Radius: 2.03Å
  • Cross Section (Thermal Neutron Capture) σa/barns: 2.1
  • Crystal Structure: Cubic body centered
  • Electron Configuration:
    1s2 2s2p6 3s2p6 4s1
  • Electrons per Energy Level: 2,8,8,1
    Shell Model
  • Ionic Radius: 1.38Å
  • Filling Orbital: 4s1
  • Number of Electrons (with no charge): 19
  • Number of Neutrons (most common/stable nuclide): 20
  • Number of Protons: 19
  • Oxidation States: 1
  • Valence Electrons: 4s1
    Electron Dot Model

Chemical Properties of Potassium

  • Electrochemical Equivalent: 1.4587g/amp-hr
  • Electron Work Function: 2.3eV
  • Electronegativity: 0.82 (Pauling); 0.91 (Allrod Rochow)
  • Heat of Fusion: 2.334kJ/mol
  • Incompatibilities:
  • Ionization Potential
    • First: 4.341
    • Second: 31.625
    • Third: 45.72
  • Valence Electron Potential (-eV): 10.4

Physical Properties of Potassium

  • Atomic Mass Average: 39.0983
  • Boiling Point: 1032K 759°C 1398°F
  • Coefficient of lineal thermal expansion/K-1: 83E-6
  • Conductivity
    Electrical: 0.139 106/cm Ω
    Thermal: 1.024 W/cmK
  • Density: 0.862g/cc @ 300K
  • Description:
    Very soft silvery metal that quickly oxidizes to white in air and reacts violently in water.
  • Elastic Modulus:
    • Bulk: 3.1/GPa
    • Rigidity: 1.3/GPa
    • Youngs: 3.53/GPa
  • Enthalpy of Atomization: 89.5 kJ/mole @ 25°C
  • Enthalpy of Fusion: 2.32 kJ/mole
  • Enthalpy of Vaporization: 77.5 kJ/mole
  • Flammablity Class:
  • Freezing Point:see melting point
  • Hardness Scale
    • Brinell: 0.363 MN m-2
    • Mohs: 0.4
  • Heat of Vaporization: 79.87kJ/mol
  • Melting Point: 336.5K 63.35°C 146.03°F
  • Molar Volume: 45.46 cm3/mole
  • Physical State (at 20°C & 1atm): Solid
  • Specific Heat: 0.75J/gK
  • Vapor Pressure = 0.000106Pa@63.35°C

Regulatory / Health

  • CAS Number
    • 7440-09-7
  • RTECS: TS6465000
  • OSHAPermissible Exposure Limit (PEL)
    • No limits set by OSHA
  • OSHA PEL Vacated 1989
    • No limits set by OSHA
  • NIOSHRecommended Exposure Limit (REL)
    • No limits set by NIOSH
  • 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: 1620
    • Bone/p.p.m: 2100
    • Liver/p.p.m: 16000
    • Muscle/p.p.m: 16000
    • Daily Dietary Intake: 1400-7400 mg
    • Total Mass In Avg. 70kg human: 140 g

K Electron Valence

Who / Where / When / How

  • Discoverer: Sir Humphrey Davy
  • Discovery Location: London England
  • Discovery Year: 1807
  • Name Origin:
    From potash (pot ash); K from latin: kalium
  • Abundance of Potassium:
    • Earth's Crust/p.p.m.: 21000
    • Seawater/p.p.m.: N/A
    • Atmosphere/p.p.m.: N/A
    • Sun (Relative to H=1E12): 145000
  • Sources of Potassium:
    Found in minerals like carnallite [(KMgCl3).6H2O], sylvite (KCL) and alunite. Annual world production is around 200 tons. Primary mining areas are in Germany, Spain, Canada, USA and Italy.
  • Uses of Potassium:
    Used as potash in making glass, soap, lenses and salt substitute. Also as saltpeter, potassium nitrate (KNO3) it is used to make explosives and to color fireworks in mauve.
  • Additional Notes:
    Formerly called kalium hence the symbol 'K'.

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References

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

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  • Chemical Database
    This database focuses on the most common chemical compounds used in the home and industry.
Potassium

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