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Periodic Table Element Comparison: Compare Elements - Strontium vs Selenium

Compare Strontium and Selenium

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

Facts

Strontium
38
Sr
87.62
Solid
Silver
alkaline earth metal
2
beryllium family 
5
s
[Kr] 5s2
777 °C
1382 °C
2, 8, 18, 8, 2
CAS7440-24-6
Neighborhood Elements of Strontium
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 Strontium was discovered by William Cruickshank (chemist) in year 1790 in United Kingdom. Strontium derived its name from from Strontian, a small town in Scotland
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 %)
4×10-6%
5×10-6%
8.7e-06
0.00036
8.1e-06
4.6e-06
3×10-6%
N/A
1.3e-05
5×10-6%
4.5×10-8%
5×10-6%

Crystal Structure and Atomic Structure

219 pm
33.315589353612 cm3
192 pm
N/A
1.2
strontium Spectrum
608.49, 608.49, 608.49 pm
π/2, π/2, π/2
Fm_ 3m
225

Face Centered Cubic

strontium 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
38
38
38
87.62
49.62
2, 8, 18, 8, 2
[Kr] 5s2
5s2
 1;2
1S0
strontium 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:
84Sr, 86Sr, 87Sr, 88Sr.
Naturally occurring stable isotopes:
74Se, 76Se, 77Se, 78Se, 80Se.

Chemical Properties: Ionization Energies and electron affinity

2
0.95
5.03 kJ/mol
549.5, 1064.2, 4138, 5.5×103, 6910, 8760, 10230, 1.18×104, 1.56×104, 1.71×104 kJ/mol
6
2.55
195 kJ/mol
941, 2045, 2973.7, 4144, 6590, 7880, 14990 kJ/mol

Physical Properties

2.63 g/cm3
33.315589353612

 

N/A
6.1 GPa
N/A
0.28


 

1.5 MPa
N/A
N/A

 

7.7×106 S/m
1.3×10-7 m Ω
N/A

 

35 W/(m K)
0.0000225 K-1

 

Paramagnetic
N/A
1.32×10-9
1.16×10-10
3.47×10-6

 

N/A

 

N/A
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

777 °C
1382 °C
N/A
N/A

 

8 kJ/mol
137 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

CAS7440-24-6
N/A
4.2
1383
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