Potassium

A chemical element, in the periodic table potassium has the symbol K and atom number 19.

Name: Potassium
Symbol: K
Group: Alkali metal
Crystal Structure: Cubicbody centered
Atomic number: 19
Atomic weight: 39.0983
Shells: 2,8,8,1
Filling orbital: 4s1
Melt: 63.65°C
Boil: 774°C
Electronegativity: 0.82
Covalent radius: 2.03 Å
Atomic radius: 2.77 Å
Atomic volume: 45.46 cm/mol
First ionization potential: 4.341 V
2nd ionization potential: 31.625 V
3rd ionization potential: 45.72 V
Oxidation states: 1
Density @ 293 K: 0.862 g/cm
Specific heat: 0.75 J/gK
Heat of vaporization: 79.870 kJ/mol
Heat of fusion: 2.334 kJ/mol
Electrical conductivity: 0.139 10^6/cm ohm
Thermal conductivity: 1.024 W/cmK

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See: Periodic table