Periodic Table Element Comparison: Compare Elements - Helium vs Silicon

Compare Helium and Silicon

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

Name	Helium	Silicon
Atomic Number	2	14
Atomic Symbol	He	Si
Atomic Weight	4.002602	28.0855
Phase at STP	Gas	Solid
Color	Colorless	Gray
Metallic Classification	Noble Gas	Metalloid
Group in Periodic Table	group 18	group 14
Group Name	helium family or neon family	carbon family
Period in Periodic Table	period 1	period 3
Block in Periodic Table	p -block	p -block
Electronic Configuration	1s2	[Ne] 3s2 3p2
Electronic Shell Structure (Electrons per shell)	2	2, 8, 4
Melting Point	0 K	1687 K
Boiling Point	4.22 K	3173 K
CAS Number	CAS7440-59-7	CAS7440-21-3
Neighborhood Elements	Neighborhood Elements of Helium	Neighborhood Elements of Silicon

History	The element Helium was discovered by P. Janssen and N. Lockyer in year 1868 in Sweden and United Kingdom. Helium derived its name from the Greek word helios, meaning 'sun'.	The element Silicon was discovered by J. Berzelius in year 1823 in Sweden. Silicon derived its name from the Latin silex, 'flint' (originally silicium).
Discovery	P. Janssen and N. Lockyer (1868)	J. Berzelius (1823)
Isolated	W. Ramsay,T. Cleve, and N. Langlet (1895)	J. Berzelius (1823)

Abundance in Universe	230000000 / 72000000	700000 / 30000
Abundance in Sun	230000000 / 74000000	900000 / 40000
Abundance in Meteorites	- / -	140000000 / 100000000
Abundance in Earth's Crust	5.5 / 30	270000000 / 200000000
Abundance in Oceans	0.0072 / 0.011	1000 / 220
Abundance in Humans	- / -	260000 / 58000

Atomic Volume	22.4136 cm3/mol	12.054 cm3/mol
Atomic Radius	31 pm	111 pm
Covalent Radius	32 pm	111 pm
Van der Waals Radius	140 pm	210 pm
Atomic Spectrum
Lattice Constant	424.2, 424.2, 424.2 pm	543.09, 543.09, 543.09 pm
Lattice Angle	π/2, π/2, π/2	π/2, π/2, π/2
Space Group Name	Fm_ 3m	Fd_ 3m
Space Group Number	225	227
Crystal Structure	Face Centered Cubic	Tetrahedral Packing

Atomic Number	2	14
Number of Electrons (with no charge)	2	14
Number of Protons	2	14
Mass Number	4.002602	28.0855
Number of Neutrons	2	14
Shell structure (Electrons per energy level)	2	2, 8, 4
Electron Configuration	1s2	[Ne] 3s2 3p2
Valence Electrons	1s2	3s2 3p2
Oxidation State	-	-4, 4
Atomic Term Symbol (Quantum Numbers)	1S0	3P0
Shell structure

Known Isotopes	3He, 4He, 5He, 6He, 7He, 8He, 9He, 10He	22Si, 23Si, 24Si, 25Si, 26Si, 27Si, 28Si, 29Si, 30Si, 31Si, 32Si, 33Si, 34Si, 35Si, 36Si, 37Si, 38Si, 39Si, 40Si, 41Si, 42Si, 43Si, 44Si
Stable Isotopes	Naturally occurring stable isotopes: 3He, 4He	Naturally occurring stable isotopes: 28Si, 29Si, 30Si
Neutron Cross Section	0.007	171
Neutron Mass Absorption	0.00001	0.0002

Valence or Valency	0	4
Electronegativity	-	1.9 Pauling Scale
Electron Affinity	0 kJ/mol	133.6 kJ/mol
Ionization Energies	1st: 2372.3 kJ/mol 2nd: 5250.5 kJ/mol	1st: 786.5 kJ/mol 2nd: 1577.1 kJ/mol 3rd: 3231.6 kJ/mol 4th: 4355.5 kJ/mol 5th: 16091 kJ/mol 6th: 19805 kJ/mol 7th: 23780 kJ/mol 8th: 29287 kJ/mol 9th: 33878 kJ/mol 10th: 38726 kJ/mol 11th: 45962 kJ/mol 12th: 50502 kJ/mol 13th: 235196 kJ/mol 14th: 257923 kJ/mol

Density	0.0001785 g/cm3	2.33 g/cm3
Molar Volume	22.4136 cm3/mol	12.054 cm3/mol
Elastic Properties
Young Modulus	-	47
Shear Modulus	-	-
Bulk Modulus	-	100 GPa
Poisson Ratio	-	-
Hardness - Tests to Measure of Hardness of Element
Mohs Hardness	-	6.5 MPa
Vickers Hardness	-	-
Brinell Hardness	-	-
Electrical Properties
Electrical Conductivity	-	1000 S/m
Resistivity	-	0.001 m Ω
Superconducting Point	-	-
Heat and Conduction Properties
Thermal Conductivity	0.1513 W/(m K)	150 W/(m K)
Thermal Expansion	-	0.0000026 /K
Magnetic Properties
Magnetic Type	Diamagnetic	Diamagnetic
Curie Point	-	-
Mass Magnetic Susceptibility	-5.9e-9 m3/kg	-1.6e-9 m3/kg
Molar Magnetic Susceptibility	-2.36e-11 m3/mol	-4.49e-11 m3/mol
Volume Magnetic Susceptibility	-1.05e-9	-0.00000373
Optical Properties
Refractive Index	1.000035	-
Acoustic Properties
Speed of Sound	970 m/s	2200 m/s

CAS Number	CAS7440-59-7	CAS7440-21-3
RTECS Number	RTECSMH6520000	RTECSVW0400000
DOT Hazard Class	2.2	4.1
DOT Numbers	1963	1346
EU Number	-	-
NFPA Fire Rating	0	0
NFPA Hazards	-	-
NFPA Health Rating	1	1
NFPA Reactivity Rating	0	0
AutoIgnition Point	-	150 °C
Flashpoint	-	-

Periodic Table Element Comparison: Compare Elements - Helium vs Silicon

Compare Helium and Silicon

Facts

History

Presence: Abundance in Nature and Around Us

Crystal Structure and Atomic Structure

Atomic and Orbital Properties

Isotopes and Nuclear Properties

Chemical Properties: Ionization Energies and electron affinity

Physical Properties

Elastic Properties

Hardness - Tests to Measure of Hardness of Element

Electrical Properties

Heat and Conduction Properties

Magnetic Properties

Optical Properties

Acoustic Properties

Thermal Properties - Enthalpies and thermodynamics

Enthalpies

Regulatory and Health - Health and Safety Parameters and Guidelines

Compare With Other Elements

Compare Helium with all Group 18 elements

Compare Helium with all Period 1 elements

Compare Helium with all Noble Gas elements

Compare Silicon with all Group 14 elements

Compare Silicon with all Period 3 elements

Compare Silicon with all Metalloid elements