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Periodic Table Element Comparison: Compare Elements - Samarium vs Selenium

Compare Samarium and Selenium

Compare Samarium and Selenium on the basis of their properties, attributes and periodic table facts. Compare elements on more than 90 properties. All the elements of similar categories show a lot of similarities and differences in their chemical, atomic, physical properties and uses. These similarities and dissimilarities should be known while we study periodic table elements. You can study the detailed comparison between Samarium vs Selenium with most reliable information about their properties, attributes, facts, uses etc. You can compare Sm vs Se on more than 90 properties like electronegativity , oxidation state, atomic shells, orbital structure, Electronaffinity, physical states, electrical conductivity and many more.

Facts

Samarium
62
Sm
150.36
Solid
Silver
lanthanide
N/A
 
6
f
[Xe] 4f6 6s2
1072 °C
1803 °C
2, 8, 18, 24, 8, 2
CAS7440-19-9
Neighborhood Elements of Samarium
Selenium
34
Se
78.96
Solid
Gray
other nonmetal
16
oxygen family 
4
p
[Ar] 3d10 4s2 4p4
221 °C
685 °C
2, 8, 18, 6
CAS7782-49-2
Neighborhood Elements of Selenium

History

History
The element Samarium was discovered by Lecoq de Boisbaudran in year 1879 in France. Samarium derived its name from from Samarskite, the name of the mineral from which it was first isolated
The element Selenium was discovered by Jöns Jakob Berzelius in year 1817 in Sweden. Selenium derived its name derived its name from from the Greek selene, meaning 'moon'

Presence: Abundance in Nature and Around Us

Ppb by weight (1ppb =10^-7 %)
5×10-7%
1×10-7%
1.7e-07
6e-06
4.5×10-11%
N/A
3×10-6%
N/A
1.3e-05
5×10-6%
4.5×10-8%
5×10-6%

Crystal Structure and Atomic Structure

238 pm
20.448796409629 cm3
N/A
N/A
5.9×103
samarium Spectrum
362.1, 362.1, 2625 pm
π/2, π/2, 2 π/3
R_ 3m
166

Simple Trigonal

samarium Crystal Structure
103 pm
16.385142145673 cm3
116 pm
190 pm
11.7
selenium Spectrum
905.4, 908.3, 1160.1 pm
π/2, 1.58493, π/2
P121/c1
14

Simple Monoclinic

selenium Crystal Structure

Atomic and Orbital Properties

Atomic Number
Number of Electrons (with no charge)
Number of Protons
Mass Number
Number of Neutrons
Shell structure (Electrons per energy level)
Electron Configuration
Valence Electrons
Oxidation State
Atomic Term Symbol (Quantum Numbers)
Shell structure
62
62
62
150.36
88.36
2, 8, 18, 24, 8, 2
[Xe] 4f6 6s2
4f6 6s2
 2;3
7F0
samarium Shells
34
34
34
78.96
44.96
2, 8, 18, 6
[Ar] 3d10 4s2 4p4
4s2 4p4
-2;-1  1;2;3;4;5;6
3P2
selenium Shells

Isotopes - Nuclear Properties

Isotopes
Naturally occurring stable isotopes:
144Sm, 149Sm, 150Sm, 152Sm, 154Sm.
Naturally occurring stable isotopes:
74Se, 76Se, 77Se, 78Se, 80Se.

Chemical Properties: Ionization Energies and electron affinity

3
1.17
50 kJ/mol
544.5, 1070, 2260, 3990 kJ/mol
6
2.55
195 kJ/mol
941, 2045, 2973.7, 4144, 6590, 7880, 14990 kJ/mol

Physical Properties

7.353 g/cm3
20.448796409629

 

50 GPa
20 GPa
38 GPa
0.27


 

N/A
412 MPa
441 MPa

 

1.1×106 S/m
9.4×10-7 m Ω
N/A

 

13 W/(m K)
0.0000127 K-1

 

Paramagnetic
N/A
1.11×10-7
1.669×10-8
0.00081618

 

N/A

 

2130 m/s
4.819 g/cm3
16.385142145673

 

10 GPa
3.7 GPa
8.3 GPa
0.33


 

2 MPa
N/A
736 MPa

 

N/A
N/A
N/A

 

0.52 W/(m K)
N/A

 

Diamagnetic
N/A
-4×10-9
-3.16×10-10
-1.93e-05

 

1.000895

 

3350 m/s

Thermal Properties - Enthalpies and thermodynamics

1072 °C
1803 °C
N/A
N/A

 

8.6 kJ/mol
175 kJ/mol
N/A
221 °C
685 °C
1766 K
N/A

 

5.4 kJ/mol
26 kJ/mol
{"N/A", "N/A", "N/A"} J/(kg K)

Regulatory and Health - Health and Safety Parameters and Guidelines

CAS7440-19-9
N/A
4.1
1325
N/A
1
N/A
1
1

 

150 °C
N/A
CAS7782-49-2
{N/A, RTECSVS7700000, N/A}
{N/A, 6.1, N/A}
"N/A", {2658}, "N/A"
{N/A, N/A, N/A}
{N/A, 0, N/A}
N/ A, N/ A, N/ A
{N/A, 2, N/A}
{N/A, 0, N/A}

 

N/A
N/A