ସ୍କାଣ୍ଡିଅମ

ଉଇକିପିଡ଼ିଆ ରୁ
Scandium
21Sc
-

Sc

Y
calciumscandiumtitanium
ଭୌତିକ ରୁପ
silvery white
ସାଧାରଣ ଧର୍ମ
ନାମ, ପ୍ରତୀକ,
ପରମାଣୁ କ୍ରମାଙ୍କ
scandium, Sc,
21
ଉଚ୍ଚାରଣ /ˈskændiəm/ skan-dee-əm
ମୌଳିକ ପ୍ରକାର transition metal
ଶ୍ରେଣୀ, ପର୍ଯ୍ୟାୟ, ବ୍ଲକ୍ 3, 4, d
ମାନକ ପରମାଣବିକ ଓଜନ 44.955912(6)
ଇଲେକ୍‌ଟ୍ରୋନ୍ ବିନ୍ୟାସ [Ar] 3d1 4s2
2, 8, 9, 2
Electron shells of scandium (2, 8, 9, 2)
ଇତିହାସ
ପୂର୍ବାନୁମାନ Dmitri Mendeleev (1871)
ଆବିଷ୍କାର Lars Fredrik Nilson (1879)
First isolation Lars Fredrik Nilson (1879)
ଭୌତିକ ଧର୍ମ
ଅବସ୍ଥା solid
(ରୁମ୍ ଟେମ୍ପରେଚର୍‌ରେ ଘନତା) 2.985 g·cm−3
Liquid density at m.p. 2.80 g·cm−3
ଗଳନାଙ୍କ 1814 K, 1541 °C, 2806 °F
ସ୍ଫୁଟନାଙ୍କ 3109 K, 2836 °C, 5136 °F
Heat of fusion 14.1 kJ·mol−1
Heat of vaporization 332.7 kJ·mol−1
Molar heat capacity 25.52 J·mol−1·K−1
Vapor pressure
P (Pa) 1 10 100 1 k 10 k 100 k
at T (K) 1645 1804 (2006) (2266) (2613) (3101)
Atomic properties
Oxidation states 3, 2[୧], 1[୨]
(amphoteric oxide)
Electronegativity 1.36 (Pauling scale)
Ionization energies
(more)
1st: 633.1 kJ·mol−1
2nd: 1235.0 kJ·mol−1
3rd: 2388.6 kJ·mol−1
Atomic radius 162 pm
Covalent radius 170±7 pm
Van der Waals radius 211 pm
Miscellanea
Crystal structure hexagonal close-packed
Magnetic ordering paramagnetic
Electrical resistivity (r.t.) (α, poly)
calc. 562 nΩ·m
Thermal conductivity 15.8 W·m−1·K−1
Thermal expansion (r.t.) (α, poly)
10.2 µm/(m·K)
Young's modulus 74.4 GPa
Shear modulus 29.1 GPa
Bulk modulus 56.6 GPa
Poisson ratio 0.279
Brinell hardness 750 MPa
CAS registry number 7440-20-2
Most stable isotopes
Main article: Isotopes of scandium
iso NA half-life DM DE (MeV) DP
44m2Sc syn 58.61 h IT 0.2709 44Sc
γ 1.0, 1.1, 1.1 44Sc
ε - 44Ca
45Sc 100% 45Sc is stable with 24 neutrons
46Sc syn 83.79 d β 0.3569 46Ti
γ 0.889, 1.120 -
47Sc syn 3.3492 d β 0.44, 0.60 47Ti
γ 0.159 -
48Sc syn 43.67 h β 0.661 48Ti
γ 0.9, 1.3, 1.0 -
· r

ସ୍କାଣ୍ଡିଅମ ହେଉଛି ଏକ ରାସାୟନିକ ମୌଳିକ ଯାହାର ପ୍ରତୀକ Scପରମାଣୁ କ୍ରମାଙ୍କ ୨୧ ଅଟେ ।

ଧର୍ମ[ସମ୍ପାଦନା]

ଉପସ୍ଥିତି[ସମ୍ପାଦନା]

ଗଠନ[ସମ୍ପାଦନା]

ଉତ୍ପାଦନ[ସମ୍ପାଦନା]

ସମସ୍ଥାନିକ[ସମ୍ପାଦନା]

ବ୍ୟବହାର[ସମ୍ପାଦନା]

ଆଧାର[ସମ୍ପାଦନା]

  1. McGuire, Joseph C.; Kempter, Charles P. (1960). "Preparation and Properties of Scandium Dihydride". Journal of Chemical Physics 33: 1584–1585. Bibcode:1960JChPh..33.1584M. doi:10.1063/1.1731452. 
  2. Smith, R. E. (1973). "Diatomic Hydride and Deuteride Spectra of the Second Row Transition Metals". Proceedings of the Royal Society of London. Series A, Mathematical and Physical Sciences 332 (1588): 113–127. Bibcode:1973RSPSA.332..113S. doi:10.1098/rspa.1973.0015. 

ଆହୁରି ପଢନ୍ତୁ[ସମ୍ପାଦନା]

  • Eric Scerri, The Periodic System, Its Story and Its Significance, Oxford University Press, New York, 2007.

ବାହାର ଲିଙ୍କ[ସମ୍ପାଦନା]