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Periodic Table Element Comparison: Compare Elements - Manganese vs Selenium

Compare Manganese and Selenium

Compare Manganese 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 Manganese vs Selenium with most reliable information about their properties, attributes, facts, uses etc. You can compare Mn vs Se on more than 90 properties like electronegativity , oxidation state, atomic shells, orbital structure, Electronaffinity, physical states, electrical conductivity and many more.

Facts

Manganese
25
Mn
54.938049
Solid
Silver
transition metal
7
manganese family 
4
d
[Ar] 3d5 4s2
1246 °C
2061 °C
2, 8, 13, 2
CAS7439-96-5
Neighborhood Elements of Manganese
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 Manganese was discovered by Torbern Olof Bergman in year 1774 in Sweden. Manganese derived its name from corrupted from magnesia negra, see Magnesium
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 %)
8e-06
1e-05
0.0027
0.0011
2×10-7%
2e-07
3×10-6%
N/A
1.3e-05
5×10-6%
4.5×10-8%
5×10-6%

Crystal Structure and Atomic Structure

161 pm
7.3544911646586 cm3
139 pm
N/A
13.3
manganese Spectrum
891.25, 891.25, 891.25 pm
π/2, π/2, π/2
I_ 43m
217

Body Centered Cubic

manganese 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
25
25
25
54.938049
29.938049
2, 8, 13, 2
[Ar] 3d5 4s2
3d5 4s2
-3;-2;-1  1;2;3;4;5;6;7
6S5/2
manganese 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:
55Mn.
Naturally occurring stable isotopes:
74Se, 76Se, 77Se, 78Se, 80Se.

Chemical Properties: Ionization Energies and electron affinity

4
1.55
0 kJ/mol
717.3, 1509, 3248, 4940, 6990, 9220, 1.15×104, 18770, 2.14×104, 23960, 27590, 30330, 33150, 38880, 41987, 109480, 1.181×105, 1.271×105, 1.386×105, 1.485×105, 1.586×105 kJ/mol
6
2.55
195 kJ/mol
941, 2045, 2973.7, 4144, 6590, 7880, 14990 kJ/mol

Physical Properties

7.47 g/cm3
7.3544911646586

 

198 GPa
N/A
120 GPa
N/A


 

6 MPa
N/A
196 MPa

 

6.2×105 S/m
1.6×10-6 m Ω
N/A

 

7.8 W/(m K)
0.0000217 K-1

 

Paramagnetic
N/A
1.21×10-7
6.6475×10-9
0.00090387

 

N/A

 

5150 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

1246 °C
2061 °C
N/A
N/A

 

13.2 kJ/mol
220 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

CAS7439-96-5
N/A
4.1
3089
N/A
N/A
N/A
N/A
N/A

 

N/A
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