;

Periodic Table Element Comparison: Compare Elements - Selenium vs Tellurium

Compare Selenium and Tellurium

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

Facts

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
Tellurium
52
Te
127.6
Solid
Silver
metalloid
16
oxygen family 
5
p
[Kr] 4d10 5s2 5p4
449.51 °C
988 °C
2, 8, 18, 18, 6
CAS13494-80-9
Neighborhood Elements of Tellurium

History

History
The element Selenium was discovered by Jöns Jakob Berzelius in year 1817 in Sweden. Selenium derived its name from from the Greek selene, meaning 'moon'
The element Tellurium was discovered by Franz-Joseph Müller von Reichenstein in year 1783 in Romania. Tellurium derived its name derived its name from from Latin tellus, meaning 'earth'

Presence: Abundance in Nature and Around Us

Ppb by weight (1ppb =10^-7 %)
3×10-6%
N/A
1.3e-05
5×10-6%
4.5×10-8%
5×10-6%
9×10-7%
N/A
2.1e-06
9.9×10-8%
N/A
N/A

Crystal Structure and Atomic 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
123 pm
20.448717948718 cm3
135 pm
206 pm
5.4
tellurium Spectrum
445.72, 445.72, 592.9 pm
π/2, π/2, 2 π/3
P3121
152

Simple Trigonal

tellurium 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
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
52
52
52
127.6
75.6
2, 8, 18, 18, 6
[Kr] 4d10 5s2 5p4
5s2 5p4
-2;-1  1;2;3;4;5;6
3P2
tellurium Shells

Isotopes - Nuclear Properties

Isotopes
Naturally occurring stable isotopes:
74Se, 76Se, 77Se, 78Se, 80Se.
Naturally occurring stable isotopes:
120Te, 122Te, 124Te, 125Te, 126Te.

Chemical Properties: Ionization Energies and electron affinity

6
2.55
195 kJ/mol
941, 2045, 2973.7, 4144, 6590, 7880, 14990 kJ/mol
6
2.1
190.2 kJ/mol
869.3, 1790, 2698, 3610, 5668, 6820, 1.32×104 kJ/mol

Physical Properties

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
6.24 g/cm3
20.448717948718

 

43 GPa
16 GPa
65 GPa
N/A


 

2.25 MPa
N/A
180 MPa

 

1×104 S/m
0.0001 m Ω
N/A

 

3 W/(m K)
N/A

 

Diamagnetic
N/A
-3.9×10-9
-4.98×10-10
-2.43e-05

 

1.000991

 

2610 m/s

Thermal Properties - Enthalpies and thermodynamics

221 °C
685 °C
1766 K
N/A

 

5.4 kJ/mol
26 kJ/mol
{"N/A", "N/A", "N/A"} J/(kg K)
449.51 °C
988 °C
N/A
N/A

 

17.5 kJ/mol
48 kJ/mol
N/A

Regulatory and Health - Health and Safety Parameters and Guidelines

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
CAS13494-80-9
RTECSWY2625000
6.1
2811
N/A
0
N/A
2
0

 

340 °C
N/A