Periodic Table Element Comparison: Compare Elements - Radium vs Silicon

Compare Radium and Silicon

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

Name	Radium	Silicon
Atomic Number	88	14
Atomic Symbol	Ra	Si
Atomic Weight	226	28.0855
Phase at STP	Solid	Solid
Color	Silver	Gray
Metallic Classification	Alkaline Earth Metal	Metalloid
Group in Periodic Table	group 2	group 14
Group Name	beryllium family	carbon family
Period in Periodic Table	period 7	period 3
Block in Periodic Table	s -block	p -block
Electronic Configuration	[Rn] 7s2	[Ne] 3s2 3p2
Electronic Shell Structure (Electrons per shell)	2, 8, 18, 32, 18, 8, 2	2, 8, 4
Melting Point	973 K	1687 K
Boiling Point	2010 K	3173 K
CAS Number	CAS7440-14-4	CAS7440-21-3
Neighborhood Elements	Neighborhood Elements of Radium	Neighborhood Elements of Silicon

History	The element Radium was discovered by P. and M. Curie in year 1898 in France. Radium derived its name from the Latin radius, 'ray'.	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. and M. Curie (1898)	J. Berzelius (1823)
Isolated	M. Curie (1902)	J. Berzelius (1823)

Abundance in Universe	- / -	700000 / 30000
Abundance in Sun	- / -	900000 / 40000
Abundance in Meteorites	- / -	140000000 / 100000000
Abundance in Earth's Crust	0.00010 / 0.00001	270000000 / 200000000
Abundance in Oceans	0.00000001 / 0.0000000003	1000 / 220
Abundance in Humans	0.000001 / 0.00000003	260000 / 58000

Atomic Volume	41.09 cm3/mol	12.054 cm3/mol
Atomic Radius	-	111 pm
Covalent Radius	-	111 pm
Van der Waals Radius	283 pm	210 pm
Atomic Spectrum
Lattice Constant	514.8, 514.8, 514.8 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	Im_ 3m	Fd_ 3m
Space Group Number	229	227
Crystal Structure	Body Centered Cubic	Tetrahedral Packing

Atomic Number	88	14
Number of Electrons (with no charge)	88	14
Number of Protons	88	14
Mass Number	226	28.0855
Number of Neutrons	138	14
Shell structure (Electrons per energy level)	2, 8, 18, 32, 18, 8, 2	2, 8, 4
Electron Configuration	[Rn] 7s2	[Ne] 3s2 3p2
Valence Electrons	7s2	3s2 3p2
Oxidation State	2	-4, 4
Atomic Term Symbol (Quantum Numbers)	1S0	3P0
Shell structure

Known Isotopes	202Ra, 203Ra, 204Ra, 205Ra, 206Ra, 207Ra, 208Ra, 209Ra, 210Ra, 211Ra, 212Ra, 213Ra, 214Ra, 215Ra, 216Ra, 217Ra, 218Ra, 219Ra, 220Ra, 221Ra, 222Ra, 223Ra, 224Ra, 225Ra, 226Ra, 227Ra, 228Ra, 229Ra, 230Ra, 231Ra, 232Ra, 233Ra, 234Ra	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: 28Si, 29Si, 30Si
Neutron Cross Section	20	171
Neutron Mass Absorption	-	0.0002

Valence or Valency	2	4
Electronegativity	0.9 Pauling Scale	1.9 Pauling Scale
Electron Affinity	-	133.6 kJ/mol
Ionization Energies	1st: 509.3 kJ/mol 2nd: 979 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	5 g/cm3	2.33 g/cm3
Molar Volume	41.09 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	1000000 S/m	1000 S/m
Resistivity	0.000001 m Ω	0.001 m Ω
Superconducting Point	-	-
Heat and Conduction Properties
Thermal Conductivity	19 W/(m K)	150 W/(m K)
Thermal Expansion	-	0.0000026 /K
Magnetic Properties
Magnetic Type	-	Diamagnetic
Curie Point	-	-
Mass Magnetic Susceptibility	-	-1.6e-9 m3/kg
Molar Magnetic Susceptibility	-	-4.49e-11 m3/mol
Volume Magnetic Susceptibility	-	-0.00000373
Optical Properties
Refractive Index	-	-
Acoustic Properties
Speed of Sound	-	2200 m/s

CAS Number	CAS7440-14-4	CAS7440-21-3
RTECS Number	-	RTECSVW0400000
DOT Hazard Class	-	4.1
DOT Numbers	-	1346
EU Number	EU231-122-4	-
NFPA Fire Rating	-	0
NFPA Hazards	-	-
NFPA Health Rating	-	1
NFPA Reactivity Rating	-	0
AutoIgnition Point	-	150 °C
Flashpoint	-	-

Periodic Table Element Comparison: Compare Elements - Radium vs Silicon

Compare Radium 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 Radium with all Group 2 elements

Compare Radium with all Period 7 elements

Compare Radium with all Alkaline Earth Metal elements

Compare Silicon with all Group 14 elements

Compare Silicon with all Period 3 elements

Compare Silicon with all Metalloid elements