ପ୍ଲାଟିନମ

ଉଇକିପିଡ଼ିଆ ରୁ
ସିଧାସଳଖ ଯିବେ ଦିଗବାରେଣିକୁ, ଖୋଜିବେ
Platinum,  78Pt
Platinum crystals.jpg
ସାଧାରଣ ଗୁଣ
ନାମ, ପ୍ରତୀକ platinum, Pt
Appearance grayish white
ଉଚ୍ଚାରଣ /ˈplætɪnəm/
Platinum 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)
Pd

Pt

Ds
iridiumplatinumgold
ପରମାଣୁ କ୍ରମାଙ୍କ (Z) 78
ଶ୍ରେଣୀ, ବ୍ଳକ group 10, d-block
ପର୍ଯ୍ୟାୟ period 6
ମୌଳିକ ପ୍ରକାର   transition metal
ମାନକ ପରମାଣବିକ ଓଜନ (Ar) 195.084
ଇଲେକ୍‌ଟ୍ରୋନ୍ ବିନ୍ୟାସ [Xe] 4f14 5d9 6s1
per shell
2, 8, 18, 32, 17, 1
ଭୌତିକ ଗୁଣ
ଅବସ୍ଥା solid
ଗଳନାଙ୍କ 2041.4 K ​(1768.3 °C, ​3214.9 °F)
ସ୍ଫୁଟନାଙ୍କ 4098 K ​(3825 °C, ​6917 °F)
Density near r.t. 21.45 g/cm3
when liquid, at m.p. 19.77 g/cm3
Heat of fusion 22.17 kJ/mol
Heat of 469 kJ/mol
Molar heat capacity 25.86 J/(mol·K)
 pressure
P (Pa) 1 10 100 1 k 10 k 100 k
at T (K) 2330 (2550) 2815 3143 3556 4094
Atomic properties
Oxidation states 6, 5, 4, 3, 2, 1, −1, −2, −3
(mildly basic oxide)
Electronegativity Pauling scale: 2.28
Atomic radius empirical: 139 pm
Covalent radius 136±5 pm
Van der Waals radius 175 pm
Miscellanea
Crystal structure face-centered cubic (fcc)
Face-centered cubic crystal structure for platinum
Speed of sound thin rod 2800 m/s (at r.t.)
Thermal expansion 8.8 µm/(m·K) (at 25 °C)
Thermal conductivity 71.6 W/(m·K)
Electrical resistivity 105 n Ω·m (at 20 °C)
Magnetic ordering paramagnetic
Young's modulus 168 GPa
Shear modulus 61 GPa
Bulk modulus 230 GPa
Poisson ratio 0.38
Mohs hardness 4–4.5
Vickers hardness 549 MPa
Brinell hardness 392 MPa
CAS Number 7440-06-4
ଇତିହାସ
ଆବିଷ୍କାର Antonio de Ulloa (1735)
First isolation Antonio de Ulloa (1735)
Most stable isotopes of platinum
iso NA half-life DM DE (MeV) DP
190Pt 0.014% 6.5×1011 y α 3.18 186Os
192Pt 0.782% 192Pt is stable with 114 neutrons
193Pt syn 50 y ε - 193Ir
194Pt 32.967% 194Pt is stable with 116 neutrons
195Pt 33.832% 195Pt is stable with 117 neutrons
196Pt 25.242% 196Pt is stable with 118 neutrons
198Pt 7.163% >3.2×1014 y α 0.0870 194Os
ββ 1.0472 198Hg
| references

ପ୍ଲାଟିନମ ହେଉଛି ଏକ ରାସାୟନିକ ମୌଳିକ ଯାହାର ପ୍ରତୀକ Ptପରମାଣୁ କ୍ରମାଙ୍କ ୭୮ ଅଟେ ।

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