ଛାଞ୍ଚ:Infobox potassium

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Potassium,  19K
Potassium-2.jpg
Potassium Spectrum.jpg
Potassium pearls under paraffin oil. The large pearl measures 0.5 cm. Below: spectral lines of potassium
ସାଧାରଣ ଗୁଣ
ନାମ, ପ୍ରତୀକpotassium, K
Appearancesilvery gray
ଉଚ୍ଚାରଣ /pɵˈtæsiəm/ po-TAS-ee-əm
Potassium in the periodic table
Hydrogen (other non-metal)
Helium (noble gas)
Lithium (alkali metal)
Beryllium (alkaline earth metal)
Boron (metalloid)
Carbon (other non-metal)
Nitrogen (other non-metal)
Oxygen (other non-metal)
Fluorine (halogen)
Neon (noble gas)
Sodium (alkali metal)
Magnesium (alkaline earth metal)
Aluminium (post-transition metal)
Silicon (metalloid)
Phosphorus (other non-metal)
Sulfur (other non-metal)
Chlorine (halogen)
Argon (noble gas)
Potassium (alkali metal)
Calcium (alkaline earth metal)
Scandium (transition metal)
Titanium (transition metal)
Vanadium (transition metal)
Chromium (transition metal)
Manganese (transition metal)
Iron (transition metal)
Cobalt (transition metal)
Nickel (transition metal)
Copper (transition metal)
Zinc (transition metal)
Gallium (post-transition metal)
Germanium (metalloid)
Arsenic (metalloid)
Selenium (other non-metal)
Bromine (halogen)
Krypton (noble gas)
Rubidium (alkali metal)
Strontium (alkaline earth metal)
Yttrium (transition metal)
Zirconium (transition metal)
Niobium (transition metal)
Molybdenum (transition metal)
Technetium (transition metal)
Ruthenium (transition metal)
Rhodium (transition metal)
Palladium (transition metal)
Silver (transition metal)
Cadmium (transition metal)
Indium (post-transition metal)
Tin (post-transition metal)
Antimony (metalloid)
Tellurium (metalloid)
Iodine (halogen)
Xenon (noble gas)
Caesium (alkali metal)
Barium (alkaline earth metal)
Lanthanum (lanthanoid)
Cerium (lanthanoid)
Praseodymium (lanthanoid)
Neodymium (lanthanoid)
Promethium (lanthanoid)
Samarium (lanthanoid)
Europium (lanthanoid)
Gadolinium (lanthanoid)
Terbium (lanthanoid)
Dysprosium (lanthanoid)
Holmium (lanthanoid)
Erbium (lanthanoid)
Thulium (lanthanoid)
Ytterbium (lanthanoid)
Lutetium (lanthanoid)
Hafnium (transition metal)
Tantalum (transition metal)
Tungsten (transition metal)
Rhenium (transition metal)
Osmium (transition metal)
Iridium (transition metal)
Platinum (transition metal)
Gold (transition metal)
Mercury (transition metal)
Thallium (post-transition metal)
Lead (post-transition metal)
Bismuth (post-transition metal)
Polonium (post-transition metal)
Astatine (halogen)
Radon (noble gas)
Francium (alkali metal)
Radium (alkaline earth metal)
Actinium (actinoid)
Thorium (actinoid)
Protactinium (actinoid)
Uranium (actinoid)
Neptunium (actinoid)
Plutonium (actinoid)
Americium (actinoid)
Curium (actinoid)
Berkelium (actinoid)
Californium (actinoid)
Einsteinium (actinoid)
Fermium (actinoid)
Mendelevium (actinoid)
Nobelium (actinoid)
Lawrencium (actinoid)
Rutherfordium (transition metal)
Dubnium (transition metal)
Seaborgium (transition metal)
Bohrium (transition metal)
Hassium (transition metal)
Meitnerium (unknown chemical properties)
Darmstadtium (unknown chemical properties)
Roentgenium (unknown chemical properties)
Copernicium (transition metal)
Ununtrium (unknown chemical properties)
Flerovium (unknown chemical properties)
Ununpentium (unknown chemical properties)
Livermorium (unknown chemical properties)
Ununseptium (unknown chemical properties)
Ununoctium (unknown chemical properties)
Na

K

Rb
argonpotassiumcalcium
ପରମାଣୁ କ୍ରମାଙ୍କ (Z)19
ଶ୍ରେଣୀ, ବ୍ଳକgroup 1 (alkali metals), s-block
ପର୍ଯ୍ୟାୟperiod 4
ମୌଳିକ ପ୍ରକାର  alkali metal
ମାନକ ପରମାଣବିକ ଓଜନ (±) (Ar)39.0983(1)
ଇଲେକ୍‌ଟ୍ରୋନ୍ ବିନ୍ୟାସ[Ar] 4s1
per shell
2, 8, 8, 1
ଭୌତିକ ଗୁଣ
ଅବସ୍ଥାsolid
ଗଳନାଙ୍କ336.53 K ​(63.38 °C, ​146.08 °F)
ସ୍ଫୁଟନାଙ୍କ1032 K ​(759 °C, ​1398 °F)
Density near r.t.0.862 g/cm3
when liquid, at m.p.0.828 g/cm3
Triple point336.35 K, ​ kPa
Heat of fusion2.33 kJ/mol
Heat of 76.9 kJ/mol
Molar heat capacity29.6 J/(mol·K)
Atomic properties
Oxidation states1 ​strongly basic oxide
ElectronegativityPauling scale: 0.82
energies
(more)
Atomic radiusempirical: 227 pm
Covalent radius203±12 pm
Van der Waals radius275 pm
Miscellanea
Crystal structurebody-centered cubic (bcc)
Body-centered cubic crystal structure for potassium
Speed of sound thin rod2000 m/s (at 20 °C)
Thermal expansion83.3 µm/(m·K) (at 25 °C)
Thermal conductivity102.5 W/(m·K)
Electrical resistivity72 n Ω·m (at 20 °C)
Magnetic orderingparamagnetic
Young's modulus3.53 GPa
Shear modulus1.3 GPa
Bulk modulus3.1 GPa
Mohs hardness0.4
Brinell hardness0.363 MPa
CAS Number7440-09-7
ଇତିହାସ
ଆବିଷ୍କାରHumphry Davy (1807)
First isolationHumphry Davy (1807)
Most stable isotopes of potassium
iso NA half-life DM DE (MeV) DP
39K 93.26% 39K is stable with 20 neutrons
40K 0.012% 1.248(3)×109 y β 1.311 40Ca
ε 1.505 40Ar
β+ 1.505 40Ar
41K 6.73% 41K is stable with 22 neutrons
| references

References