ଆମେରିକିଅମ

ଆମେରିକିଅମ (/ˌæməˈrɪsiəm/ AM-ə-RIS-ee-əm) ହେଉଛି ଏକ ତେଜସ୍କ୍ରିୟ ରାସାୟନିକ ମୌଳିକ ଯାହାର ପ୍ରତୀକ Am ଓ ପରମାଣୁ କ୍ରମାଙ୍କ ୯୫ ।

Americium,  ₉₅Am

ସାଧାରଣ ଗୁଣ
ନାମ, ପ୍ରତୀକ	americium, Am
Appearance	silvery white
ଉଚ୍ଚାରଣ	/ˌæməˈrɪsiəm/ AM-ə-RIS-ee-əm
Americium in the periodic table
Eu ↑ Am ↓ (Uqs) plutonium ← americium → curium
ପରମାଣୁ କ୍ରମାଙ୍କ (Z)	95
ଶ୍ରେଣୀ, ବ୍ଳକ	group n/a, f-block
ପର୍ଯ୍ୟାୟ	period 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
ଅବସ୍ଥା	solid
ଗଳନାଙ୍କ	1449 K ​(1176 °C, ​2149 °F)
ସ୍ଫୁଟନାଙ୍କ	2880 K ​(2607 °C, ​4725 °F)
Density near r.t.	12 g/cm3
Heat of fusion	14.39 kJ/mol
Molar heat capacity	62.7 J/(mol·K)
pressure P (Pa) 1 10 100 1 k 10 k 100 k at T (K) 1239 1356
Atomic properties
Oxidation states	7, 6, 5, 4, 3, 2 ​amphoteric oxide
Electronegativity	Pauling scale: 1.3
Atomic radius	empirical: 173 pm
Covalent radius	180±6 pm
Miscellanea
Crystal structure	​hexagonal
Thermal conductivity	10 W/(m·K)
Electrical resistivity	0.69 µ Ω·m
Magnetic ordering	paramagnetic
CAS Number	7440-35-9
ଇତିହାସ
ଆବିଷ୍କାର	Glenn T. Seaborg, Ralph A. James, Leon O. Morgan, Albert Ghiorso (1944)
Most stable isotopes of americium
iso NA half-life DM DE (MeV) DP 241Am trace 432.2 y SF - - α 5.486 237Np 242mAm trace 141 y IT 0.049 242Am α 5.637 238Np SF - - 243Am trace 7370 y SF - - α 5.275 239Np

ଧର୍ମ

ସହାୟକ ଗ୍ରନ୍ଥ

• Wiberg, Nils (2007). Lehrbuch Der Anorganischen Chemie. De Gruyter. ISBN 978-3-11-017770-1.
• Penneman, R. A. and Keenan T. K. The radiochemistry of americium and curium, University of California, Los Alamos, California, 1960

ଆହୁରି ପଢନ୍ତୁ

• Nuclides and Isotopes – 14th Edition, GE Nuclear Energy, 1989.
• Fioni, Gabriele; Cribier, Michel and Marie, Frédéric. "Can the minor actinide, americium-241, be transmuted by thermal neutrons?". Commissariat à l'énergie atomique. Archived from the original on 2015-09-23. Retrieved 2013-04-24.{{cite web}}: CS1 maint: multiple names: authors list (link)
• Stwertka, Albert (1999). A Guide to the Elements. Oxford University Press, USA. ISBN 0-19-508083-1.

ବାହାର ଲିଙ୍କ

• Americium at The Periodic Table of Videos (University of Nottingham)
• ATSDR – Public Health Statement: Americium
• World Nuclear Association – Smoke Detectors and Americium Archived 2013-02-12 at the Wayback Machine.