Compare Scandium vs Magnesium: Periodic Table Element Comparison Table and Properties
Compare the elements Scandium and Magnesium on the basis of their properties, attributes and periodic table facts. Compare elements - Scandium and Magnesium comparison table side by side across over 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 Scandium vs Magnesium with most reliable information about their properties, attributes, facts, uses etc. You can compare Sc vs Mg on more than 90 properties like electronegativity, oxidation state, atomic shells, orbital structure, Electronaffinity, physical states, electrical conductivity and many more. This in-depth comparison helps students, educators, researchers, and science enthusiasts understand the differences and similarities between Scandium and Magnesium.
Scandium and Magnesium Comparison
Here's a detailed comparison between Scandium (Sc) and Magnesium (Mg), focusing on their position in the periodic table, physical and chemical properties, stability, and uses.
Facts - Basic Element Details
Name | Scandium | Magnesium |
---|---|---|
Atomic Number | 21 | 12 |
Atomic Symbol | Sc | Mg |
Atomic Weight | 44.95591 | 24.305 |
Phase at STP | Solid | Solid |
Color | Silver | Silver |
Metallic Classification | Transition Metal | Alkaline Earth Metal |
Group in Periodic Table | group 3 | group 2 |
Group Name | scandium family | beryllium family |
Period in Periodic Table | period 4 | period 3 |
Block in Periodic Table | d -block | s -block |
Electronic Configuration | [Ar] 3d1 4s2 | [Ne] 3s2 |
Electronic Shell Structure (Electrons per shell) | 2, 8, 9, 2 | 2, 8, 2 |
Melting Point | 1814 K | 923 K |
Boiling Point | 3103 K | 1363 K |
CAS Number | CAS7440-20-2 | CAS7439-95-4 |
Neighborhood Elements | Neighborhood Elements of Scandium | Neighborhood Elements of Magnesium |
History
Parameter | Scandium | Magnesium |
---|---|---|
History | The element Scandium was discovered by F. Nilson in year 1879 in Sweden. Scandium derived its name from Scandia, the Latin name for Scandinavia. | The element Magnesium was discovered by J. Black in year 1755 in United Kingdom. Magnesium derived its name from Magnesia, a district of Eastern Thessaly in Greece. |
Discovery | F. Nilson (1879) | J. Black (1755) |
Isolated | F. Nilson (1879) | H. Davy (1808) |
Presence: Abundance in Nature and Around Us
Parts per billion (ppb) by weight / by atoms (1ppb =10^-7 %)
Property | Scandium | Magnesium |
---|---|---|
Abundance in Universe | 30 / 1 | 600000 / 30000 |
Abundance in Sun | 40 / 1 | 700000 / 30000 |
Abundance in Meteorites | 6500 / 2900 | 120000000 / 100000000 |
Abundance in Earth's Crust | 26000 / 12000 | 29000000 / 25000000 |
Abundance in Oceans | 0.0015 / 0.00021 | 1326000 / 337000 |
Abundance in Humans | - / - | 270000 / 70000 |
Crystal Structure and Atomic Structure
Property | Scandium | Magnesium |
---|---|---|
Atomic Volume | 15.061 cm3/mol | 13.984 cm3/mol |
Atomic Radius | 184 pm | 145 pm |
Covalent Radius | 144 pm | 130 pm |
Van der Waals Radius | 211 pm | 173 pm |
Atomic Spectrum - Spectral Lines | ||
Emission Spectrum | ![]() | ![]() |
Absorption Spectrum | ![]() | ![]() |
Lattice Constant | 330.9, 330.9, 527.33 pm | 320.94, 320.94, 521.08 pm |
Lattice Angle | π/2, π/2, 2 π/3 | π/2, π/2, 2 π/3 |
Space Group Name | P63/mmc | P63/mmc |
Space Group Number | 194 | 194 |
Crystal Structure | Simple Hexagonal ![]() | Simple Hexagonal ![]() |
Atomic and Orbital Properties
Property | Scandium | Magnesium |
---|---|---|
Atomic Number | 21 | 12 |
Number of Electrons (with no charge) | 21 | 12 |
Number of Protons | 21 | 12 |
Mass Number | 44.95591 | 24.305 |
Number of Neutrons | 24 | 12 |
Shell structure (Electrons per energy level) | 2, 8, 9, 2 | 2, 8, 2 |
Electron Configuration | [Ar] 3d1 4s2 | [Ne] 3s2 |
Valence Electrons | 3d1 4s2 | 3s2 |
Oxidation State | 3 | 2 |
Atomic Term Symbol (Quantum Numbers) | 2D3/2 | 1S0 |
Shell structure | ![]() | ![]() |
Isotopes and Nuclear Properties
Scandium has 1 stable naturally occuring isotopes while Magnesium has 3 stable naturally occuring isotopes.
Parameter | Scandium | Magnesium |
---|---|---|
Known Isotopes | 36Sc, 37Sc, 38Sc, 39Sc, 40Sc, 41Sc, 42Sc, 43Sc, 44Sc, 45Sc, 46Sc, 47Sc, 48Sc, 49Sc, 50Sc, 51Sc, 52Sc, 53Sc, 54Sc, 55Sc, 56Sc, 57Sc, 58Sc, 59Sc, 60Sc | 19Mg, 20Mg, 21Mg, 22Mg, 23Mg, 24Mg, 25Mg, 26Mg, 27Mg, 28Mg, 29Mg, 30Mg, 31Mg, 32Mg, 33Mg, 34Mg, 35Mg, 36Mg, 37Mg, 38Mg, 39Mg, 40Mg |
Stable Isotopes | Naturally occurring stable isotopes: 45Sc | Naturally occurring stable isotopes: 24Mg, 25Mg, 26Mg |
Neutron Cross Section | 27.2 | 0.063 |
Neutron Mass Absorption | 0.025 | 0.0001 |
Chemical Properties: Ionization Energies and electron affinity
Property | Scandium | Magnesium |
---|---|---|
Valence or Valency | 3 | 2 |
Electronegativity | 1.36 Pauling Scale | 1.31 Pauling Scale |
Oxidation State | 3 | 2 |
Electron Affinity | 18.1 kJ/mol | 0 kJ/mol |
Ionization Energies | 1st: 633.1 kJ/mol 2nd: 1235 kJ/mol 3rd: 2388.6 kJ/mol 4th: 7090.6 kJ/mol 5th: 8843 kJ/mol 6th: 10679 kJ/mol 7th: 13310 kJ/mol 8th: 15250 kJ/mol 9th: 17370 kJ/mol 10th: 21726 kJ/mol 11th: 24102 kJ/mol 12th: 66320 kJ/mol 13th: 73010 kJ/mol 14th: 80160 kJ/mol 15th: 89490 kJ/mol 16th: 97400 kJ/mol 17th: 105600 kJ/mol 18th: 117000 kJ/mol 19th: 124270 kJ/mol 20th: 547530 kJ/mol 21st: 582163 kJ/mol | 1st: 737.7 kJ/mol 2nd: 1450.7 kJ/mol 3rd: 7732.7 kJ/mol 4th: 10542.5 kJ/mol 5th: 13630 kJ/mol 6th: 18020 kJ/mol 7th: 21711 kJ/mol 8th: 25661 kJ/mol 9th: 31653 kJ/mol 10th: 35458 kJ/mol 11th: 169988 kJ/mol 12th: 189368 kJ/mol |
Physical Properties
Magnesium (1.738 g/cm³) is less dense than Scandium (2.985 g/cm³). This means that a given volume of Scandium will be heavier than the same volume of Magnesium. Scandium is about 71.7 denser than Magnesium
Property | Scandium | Magnesium |
---|---|---|
Phase at STP | Solid | Solid |
Color | Silver | Silver |
Density | 2.985 g/cm3 | 1.738 g/cm3 |
Density (when liquid (at melting point)) | 2.8 g/cm3 | 1.584 g/cm3 |
Molar Volume | 15.061 cm3/mol | 13.984 cm3/mol |
Mechanical and Hardness Properties
Property | Scandium | Magnesium |
---|---|---|
Elastic Properties | ||
Young Modulus | 74 | 45 |
Shear Modulus | 29 GPa | 17 GPa |
Bulk Modulus | 57 GPa | 45 GPa |
Poisson Ratio | 0.28 | 0.29 |
Hardness - Tests to Measure of Hardness of Element | ||
Mohs Hardness | - | 2.5 MPa |
Vickers Hardness | - | - |
Brinell Hardness | 750 MPa | 260 MPa |
Thermal and Electrical Conductivity
Property | Scandium | Magnesium |
---|---|---|
Heat and Conduction Properties | ||
Thermal Conductivity | 16 W/(m K) | 160 W/(m K) |
Thermal Expansion | 0.0000102 /K | 0.0000082 /K |
Electrical Properties | ||
Electrical Conductivity | 1800000 S/m | 23000000 S/m |
Resistivity | 5.5e-7 m Ω | 4.4e-8 m Ω |
Superconducting Point | 0.05 | - |
Magnetic and Optical Properties
Property | Scandium | Magnesium |
---|---|---|
Magnetic Properties | ||
Magnetic Type | Paramagnetic | Paramagnetic |
Curie Point | - | - |
Mass Magnetic Susceptibility | 8.8e-8 m3/kg | 6.9e-9 m3/kg |
Molar Magnetic Susceptibility | 3.956e-9 m3/mol | 1.68e-10 m3/mol |
Volume Magnetic Susceptibility | 0.0002627 | 0.000012 |
Optical Properties | ||
Refractive Index | - | - |
Acoustic Properties | ||
Speed of Sound | - | 4602 m/s |
Thermal Properties - Enthalpies and thermodynamics
Property | Scandium | Magnesium |
---|---|---|
Melting Point | 1814 K | 923 K |
Boiling Point | 3103 K | 1363 K |
Critical Temperature | - | - |
Superconducting Point | 0.05 | - |
Enthalpies | ||
Heat of Fusion | 16 kJ/mol | 8.7 kJ/mol |
Heat of Vaporization | 318 kJ/mol | 128 kJ/mol |
Heat of Combustion | - | -668 J/(kg K) |
Regulatory and Health - Health and Safety Parameters and Guidelines
Parameter | Scandium | Magnesium |
---|---|---|
CAS Number | CAS7440-20-2 | CAS7439-95-4 |
RTECS Number | - | - |
DOT Hazard Class | 4.1 | 4.1 |
DOT Numbers | 3089 | {1869,1418} |
EU Number | - | - |
NFPA Fire Rating | - | 1 |
NFPA Health Rating | - | 0 |
NFPA Reactivity Rating | - | 1 |
NFPA Hazards | - | - |
AutoIgnition Point | - | 472 °C |
Flashpoint | - | 500 °C |
Compare Scandium and Magnesium With Other Elements
Compare Scandium and Magnesium with other elements of the periodic table. Explore howScandium and Magnesium stack up against other elements of the periodic table. Use our interactive comparison tool to analyze 90+ properties across different metals, non-metals, metalloids, and noble gases. Understanding these differences is crucial for applications in engineering, chemistry, electronics, biology, and material science.