ଆମେରିକିଅମ

ଆମେରିକିଅମ (/[invalid input: 'icon']ˌæməˈrɪsiəm/ AM-ə-RIS-ee-əm) ହେଉଛି ଏକ ତେଜସ୍କ୍ରିୟ ରାସାୟନିକ ମୌଳିକ ଯାହାର ପ୍ରତୀକ Amପରମାଣୁ କ୍ରମାଙ୍କ ୯୫ ।

Americium,  95Am
ସାଧାରଣ ଗୁଣ
ନାମ, ପ୍ରତୀକamericium, Am
Appearancesilvery white
ଉଚ୍ଚାରଣ/ˌæməˈrɪsiəm/
AM-ə-RIS-ee-əm
Americium 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)
Eu

Am

(Uqs)
plutoniumamericiumcurium
ପରମାଣୁ କ୍ରମାଙ୍କ (Z)95
ଶ୍ରେଣୀ, ବ୍ଳକgroup n/a, f-block
ପର୍ଯ୍ୟାୟperiod 7
ମୌଳିକ ପ୍ରକାର  actinide
ମାନକ ପରମାଣବିକ ଓଜନ (Ar)(243)
ଇଲେକ୍‌ଟ୍ରୋନ୍ ବିନ୍ୟାସ[Rn] 5f7 7s2
per shell
2, 8, 18, 32, 25, 8, 2
ଭୌତିକ ଗୁଣ
ଅବସ୍ଥାsolid
ଗଳନାଙ୍କ1449 K ​(1176 °C, ​2149 °F)
ସ୍ଫୁଟନାଙ୍କ2880 K ​(2607 °C, ​4725 °F)
Density near r.t.12 g/cm3
Heat of fusion14.39 kJ/mol
Molar heat capacity62.7 J/(mol·K)
 pressure
P (Pa)1101001 k10 k100 k
at T (K)12391356
Atomic properties
Oxidation states7, 6, 5, 4, 3, 2 ​amphoteric oxide
ElectronegativityPauling scale: 1.3
Atomic radiusempirical: 173 pm
Covalent radius180±6 pm
Miscellanea
Crystal structure ​hexagonal
Hexagonal crystal structure for americium
Thermal conductivity10 W/(m·K)
Electrical resistivity0.69[୧] µ Ω·m
Magnetic orderingparamagnetic
CAS Number7440-35-9
ଇତିହାସ
ଆବିଷ୍କାରGlenn T. Seaborg, Ralph A. James, Leon O. Morgan, Albert Ghiorso (1944)
Most stable isotopes of americium
isoNAhalf-lifeDMDE (MeV)DP
241Amtrace432.2 ySF--
α5.486237Np
242mAmtrace141 yIT0.049242Am
α5.637238Np
SF--
243Amtrace7370 ySF--
α5.275239Np
| references

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