ବର୍କେଲିଅମ

ଇଂରାଜୀ ଲିଙ୍କ

https://or.wikipedia.org/wiki/Berkelium

Berkelium,  ₉₇Bk

ସାଧାରଣ ଗୁଣ
ନାମ, ପ୍ରତୀକ	berkelium, Bk
Appearance	silvery
ଉଚ୍ଚାରଣ	/bərˈkiːli.əm/ bər-KEE-lee-əm less commonly: /ˈbɜːrkli.əm/ BERK-lee-əm
Berkelium in the periodic table
Tb ↑ Bk ↓ (Uqe) curium ← berkelium → californium
ପରମାଣୁ କ୍ରମାଙ୍କ (Z)	97
ଶ୍ରେଣୀ, ବ୍ଳକ	group n/a, f-block
ପର୍ଯ୍ୟାୟ	period 7
ମୌଳିକ ପ୍ରକାର	actinide
ମାନକ ପରମାଣବିକ ଓଜନ (Ar)	(247)
ଇଲେକ୍‌ଟ୍ରୋନ୍ ବିନ୍ୟାସ	[Rn] 5f9 7s2
per shell	2, 8, 18, 32, 27, 8, 2
ଭୌତିକ ଗୁଣ
ଅବସ୍ଥା	solid
ଗଳନାଙ୍କ	(beta) 1259 K ​(986 °C, ​1807 °F)
Density near r.t.	(alpha) 14.78 g/cm3 (beta) 13.25 g/cm3
Atomic properties
Oxidation states	3, 4
Electronegativity	Pauling scale: 1.3
Atomic radius	empirical: 170 pm
Miscellanea
Crystal structure	​hexagonal close-packed (hcp)
Thermal conductivity	10 W/(m·K)
Magnetic ordering	paramagnetic
CAS Number	7440-40-6
ଇତିହାସ
ଆବିଷ୍କାର	Lawrence Berkeley National Laboratory (1949)
Most stable isotopes of berkelium
iso NA half-life DM DE (MeV) DP 245Bk syn 4.94 d ε 0.810 245Cm α 6.455 241Am 246Bk syn 1.8 d α 6.070 242Am ε 1.350 246Cm 247Bk syn 1380 y α 5.889 243Am 248Bk syn >9 y α 5.803 244Am 249Bk trace 330 d α 5.526 245Am SF - - β− 0.125 249Cf

ବର୍କେଲିଅମ ହେଉଛି ଏକ ତେଜସ୍କ୍ରିୟ ରାସାୟନିକ ମୌଳିକ ଯାହାର ପ୍ରତୀକ Bk ଓ ପରମାଣୁ କ୍ରମାଙ୍କ ୯୭ ।

ସହାୟକ ଗ୍ରନ୍ଥ

• Greenwood, Norman N (1997). Chemistry of the Elements (2 ed.). Oxford: Butterworth-Heinemann. ISBN 0-08-037941-9. {{cite book}}: Invalid |ref=harv (help); Unknown parameter |coauthor= ignored (|author= suggested) (help)
• Holleman, Arnold F. (2007). Textbook of Inorganic Chemistry (102 ed.). Berlin: de Gruyter. ISBN 978-3-11-017770-1. {{cite book}}: Invalid |ref=harv (help); Unknown parameter |coauthor= ignored (|author= suggested) (help)
• Peterson, J. R. (1984). "The Chemistry of Berkelium". In Emeléus, Harry Julius (ed.). Advances in inorganic chemistry and radiochemistry. Vol. 28. Academic Press. pp. 29–64. doi:10.1016/S0898-8838(08)60204-4. ISBN 0-12-023628-1. {{cite book}}: Invalid |ref=harv (help); Unknown parameter |coauthor= ignored (|author= suggested) (help)

ବାହାର ଲିଙ୍କ

• Berkelium at The Periodic Table of Videos (University of Nottingham)