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Periodic Table Element Comparison: Compare Elements - Silicon vs Aluminium

Compare Silicon and Aluminium

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

Facts

Silicon
14
Si
28.0855
Solid
Gray
metalloid
14
carbon family 
3
p
[Ne] 3s2 3p2
1414 °C
2.9×103 °C
2, 8, 4
CAS7440-21-3
Neighborhood Elements of Silicon
Aluminium
13
Al
26.981538
Solid
Silver
post-transition metal
13
boron family 
3
p
[Ne] 3s2 3p1
660.32 °C
2519 °C
2, 8, 3
CAS7429-90-5
Neighborhood Elements of Aluminium

History

History
The element Silicon was discovered by Jöns Jacob Berzelius in year 1824 in Sweden. Silicon derived its name from from the Latin silex, 'flint' (originally silicium)
The element Aluminium was discovered by in year 1825 in Denmark. Aluminium derived its name derived its name from from alumina, a compound (originally aluminum)

Presence: Abundance in Nature and Around Us

Ppb by weight (1ppb =10^-7 %)
0.0007
0.0009
0.14
0.27
1e-06
0.00026
5e-05
6e-05
0.0091
0.081
5×10-7%
9e-07

Crystal Structure and Atomic Structure

111 pm
12.053862660944 cm3
111 pm
210 pm
171
silicon Spectrum
543.09, 543.09, 543.09 pm
π/2, π/2, π/2
Fd_ 3m
227

Tetrahedral Packing

silicon Crystal Structure
118 pm
9.9931622222222 cm3
118 pm
N/A
0.233
aluminium Spectrum
404.95, 404.95, 404.95 pm
π/2, π/2, π/2
Fm_ 3m
225

Face Centered Cubic

aluminium 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
14
14
14
28.0855
14.0855
2, 8, 4
[Ne] 3s2 3p2
3s2 3p2
-4;-3;-2;-1  1;2;3;4
3P0
silicon Shells
13
13
13
26.981538
13.981538
2, 8, 3
[Ne] 3s2 3p1
3s2 3p1
-2;-1  1;2;3
2P1/2
aluminium Shells

Isotopes - Nuclear Properties

Isotopes
Naturally occurring stable isotopes:
28Si, 29Si, 30Si.
Naturally occurring stable isotopes:
27Al.

Chemical Properties: Ionization Energies and electron affinity

4
1.9
133.6 kJ/mol
786.5, 1577.1, 3231.6, 4355.5, 16091, 19805, 23780, 29287, 33878, 38726 kJ/mol
3
1.61
42.5 kJ/mol
577.5, 1816.7, 2744.8, 11577, 14842, 18379, 23326, 27465, 31853, 38473 kJ/mol

Physical Properties

2.33 g/cm3
12.053862660944

 

47 GPa
N/A
100 GPa
N/A


 

6.5 MPa
N/A
N/A

 

1×103 S/m
0.001 m Ω
N/A

 

150 W/(m K)
2.6×10-6 K-1

 

Diamagnetic
N/A
-1.6×10-9
-4.49×10-11
-3.73×10-6

 

N/A

 

2.2×103 m/s
2.7 g/cm3
9.9931622222222

 

70 GPa
26 GPa
76 GPa
0.35


 

2.75 MPa
167 MPa
245 MPa

 

3.8×107 S/m
2.6×10-8 m Ω
1.175

 

235 W/(m K)
0.0000231 K-1

 

Paramagnetic
N/A
7.8×10-9
2.1×10-10
2.11e-05

 

N/A

 

5.1×103 m/s

Thermal Properties - Enthalpies and thermodynamics

1414 °C
2.9×103 °C
N/A
N/A

 

50.2 kJ/mol
359 kJ/mol
-9055 J/(kg K)
660.32 °C
2519 °C
N/A
1.175

 

10.7 kJ/mol
293 kJ/mol
N/A

Regulatory and Health - Health and Safety Parameters and Guidelines

CAS7440-21-3
RTECSVW0400000
4.1
1346
N/A
0
N/A
1
0

 

150 °C
N/A
CAS7429-90-5
RTECSBD0330000
4.3
1396
N/A
1
N/A
0
1

 

400 °C
645 °C