
Europium (Eu) is a chemical element of the periodic table, located in the period 6, and has the atomic number 63. It is the seventh element in the lanthanide series. It is a soft, silvery-white metal, which is named after Europe. It is the softest and the most reactive element in the lanthanide series and is counted as one of the rare earth elements.
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– f block |
FAQs on Europium Element
Europium |
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‣ What does europium look like? Appearance: silvery white, with a pale yellow tint; but rarely seen without oxide discoloration |
‣ Who discovered europium? When was the element europium discovered? Discovery and first isolation: Eugene-Anatole Demarcay (1896, 1901) |
‣ Where is europium found on the periodic table?![]() Location: Europium is found in the sixth row of the periodic table, next to the samarium element. |
‣ What’s the atomic mass number for europium? Atomic number (Z): 63 |
‣ Europium symbol: Eu |
‣ Correct atomic weight of europium Standard atomic weight: 151.964 |
‣ Which block does europium belong to? Block: f-block |
‣ What period is europium in the periodic table? Period: 6 |
‣ What is the atomic radius of europium? Atomic radius: empirical: 180 pm |
‣ Europium covalent radius: 198±6 pm |
‣ What is europium melting point? Melting point: 1099 K (826 °C, 1519 °F) |
‣ What is europium boiling point? Boiling point: 1802 K (1529 °C, 2784 °F) |
‣ How many electron shells does europium have? Electrons per shell: 2, 8, 18, 25, 8, 2 |
‣ What is the electron configuration of europium? Electron configuration: [Xe] 4f7 6s2 |
‣ Europium ionization energies: 1st: 547.1 kJ/mol 2nd: 1085 kJ/mol 3rd: 2404 kJ/mol |
‣ What is the phase of europium? Phase (at r.t): solid |
‣ Europium density (near r.t): 5.264 g/cm3 when liquid (at m.p): 5.13 g/cm3 |
‣ Europium magnetic ordering: paramagnetic |
‣ Europium natural occurrence: primordial |
‣ Oxidation state of europium: +2, +3 |
‣ What’s the electronegativity of europium? Electronegativity: Pauling scale: 1.2 |
‣ Europium poisson’s ratio: 0.152 |
‣ Europium heat of fusion: 9.21 kJ/mol |
‣ Europium heat of vaporization: 176 kJ/mol |
‣ Europium molar heat capacity: 27.66 J/(mol K) |
‣ Europium molar magnetic susceptibility: +34000.0 × 10-6 cm3/mol |
‣ Europium crystal structure: body-centered cubic (bcc) |
‣ Thermal expansion of europium: poly: 35.0 µm/(m.K) (at r.t) |
‣ Thermal conductivity of europium: est. 13.9 W/(m.K) |
‣ Europium electrical resistivity: poly: 0.900 µΩ.m (at r.t) |
‣ Europium hardness Vickers hardness: 165-200 MPa |
‣ Young’s modulus of europium: 18.2 GPa |
‣ Shear modulus of europium: 7.9 GPa |
‣ Bulk modulus of europium: 8.3 GPa |
‣ Europium CAS number: 7440-53-1 |
‣ Europium vapor pressure
Vapor pressure | ||||||
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P (Pa) | 1 | 10 | 100 | 1 k | 10 k | 100 k |
at T (K) | 863 | 957 | 1072 | 1234 | 1452 | 1796 |
‣ How many isotopes does europium have?
Main isotopes of europium | ||||
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Isotope | Abundance | Half-life (t1/2) | Decay mode | Product |
150Eu | syn | 36.9 y | ε | 150Sm |
151Eu | 47.8 % | 5 × 1018 y | α | 147Pm |
152Eu | syn | 13.54 y | ε β– | 152Sm 152Gd |
153Eu | 52.2 % | stable | ||
154Eu | syn | 8.59 y | β– | 154Gd |
155Eu | syn | 4.76 y | β– | 155Gd |
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