Sc - Scandium

Scandium was discovered in 1879 by Nilson in Sweden.

Atomic number - 21 Density g/mL 3

Atomic weight u 44 .9559 Melting point K 1812

Bonding radius A 1 .44 Boiling point K 3104

Atomic radius A 2 .09 Heat of vaporization kJ/mol 314 .2

Ionization Potential V 6 .54 Heat of fusion kJ/mol 14 .1

Electronegativity - 1 .36 Specific heat J/gK 0 .6

The oxide is a weak base.
Crystal are hexagonal.

Electron config. : [Ar] 3d¹ 4s²

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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

H He

Li Be B C N O F Ne

Na Mg Al Si P S Cl Ar

K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr

Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe

Cs Ba La* Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn

Fr Ra Ac** Rf Db Sg Bh Hs Mt 110 111 112 113

Lanthanides* Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu

Actinides ** Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr

Isotopes of Sc: Click mass number for decay process, product for element page.

040
182.3 msec
EC/ECa/ECp,14.320
Ca-40/Ar-36/K-39
39.977964 041
596.3 msec
EC,6.495 MeV
Ca-41
40.969251 042
681.3 msec
EC,6.426 MeV
Ca-42
41.965516 042a
61.7 sec
EC,7.042 MeV
Ca-42
41.966178 043
3.891 hr
EC,2.221 MeV
Ca-43
42.961151 044
3.927 hr
EC,3.653 MeV
Ca-44
43.959403 045 100%

Stable

44.955910

046
83.79 da
B-,2.367 MeV
Ti-46
45.955170 047
3.3492 da
B-,1.992 MeV
Ti-47
46.952407 048
43.67 hr
B-,3.994 MeV
Ti-48
47.952234 049
57.2 min
B-,2.006 MeV
Ti-49
48.950024 050
102.5 sec
B-,6.888 MeV
Ti-50
49.952186 051
12.4 sec
B-,6.508 MeV
Ti-51
50.953602 052
8.2 sec
B-,9.010 MeV
Ti-52
51.956564

054
1 usec
B-,11.300 MeV
Ti-54
53.962962 MASS abund.
Halflife
Particle, Energy
Decay Product(s)
Isotopic Mass

Updated by clh on 2/6/98. This is not a publication of Phoenix College.

Atomic number	-	21		Density	g/mL	3
Atomic weight	u	44	.9559	Melting point	K	1812
Bonding radius	A	1	.44	Boiling point	K	3104
Atomic radius	A	2	.09	Heat of vaporization	kJ/mol	314	.2
Ionization Potential	V	6	.54	Heat of fusion	kJ/mol	14	.1
Electronegativity	-	1	.36	Specific heat	J/gK	0	.6
The oxide is a weak base.				Crystal are hexagonal.
Electron config. : [Ar] 3d¹ 4s²
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040 182.3 msec EC/ECa/ECp,14.320 Ca-40/Ar-36/K-39 39.977964	041 596.3 msec EC,6.495 MeV Ca-41 40.969251	042 681.3 msec EC,6.426 MeV Ca-42 41.965516	042a 61.7 sec EC,7.042 MeV Ca-42 41.966178	043 3.891 hr EC,2.221 MeV Ca-43 42.961151	044 3.927 hr EC,3.653 MeV Ca-44 43.959403	045 100% Stable 44.955910
046 83.79 da B-,2.367 MeV Ti-46 45.955170	047 3.3492 da B-,1.992 MeV Ti-47 46.952407	048 43.67 hr B-,3.994 MeV Ti-48 47.952234	049 57.2 min B-,2.006 MeV Ti-49 48.950024	050 102.5 sec B-,6.888 MeV Ti-50 49.952186	051 12.4 sec B-,6.508 MeV Ti-51 50.953602	052 8.2 sec B-,9.010 MeV Ti-52 51.956564
054 1 usec B-,11.300 MeV Ti-54 53.962962	MASS abund. Halflife Particle, Energy Decay Product(s) Isotopic Mass