|Name in Saurian|| Vuhutaim (Vu)|
|Systematic name|| Unquadoctium (Uqo)|
|Location on the periodic table|
|Above element||Curium (96Cm)|
|Previous element||Boltzmannium (147Bo)|
|Next element||Avogadrium (149Av)|
|Atomic mass||411.4110 u, 683.1640 yg|
|Atomic radius||129 pm, 1.29 Å|
|Van der Waals radius||175 pm, 1.75 Å|
|Nucleons||408 (148 p+, 260 n0)|
|Nuclear radius||8.86 fm|
|Electron configuration|| [Mc] 5g18 6f6 7d2 8s2 8p2|
2, 8, 18, 32, 50, 24, 10, 4
|Oxidation states|| 0, +2, +4|
(mildly basic oxide)
|First ionization energy||838.3 kJ/mol, 8.688 eV|
|Electron affinity||77.2 kJ/mol, 0.800 eV|
|Covalent radius||141 pm, 1.41 Å|
|Molar mass||411.411 g/mol|
|Molar volume||35.931 cm3/mol|
|Atomic number density|| 1.46 × 1021 g−1|
1.68 × 1022 cm−3
|Average atomic separation||391 pm, 3.91 Å|
|Speed of sound||4989 m/s|
|Crystal structure||Simple hexagonal|
|Melting point|| 607.17 K, 1092.91°R|
|Boiling point|| 5510.26 K, 9918.47°R|
|Liquid range||4903.09 K, 8825.56°R|
|Triple point|| 607.28 K, 1093.11°R|
@ 2.5617 × 10−12 aPa, 1.9214 × 10−32 torr
|Critical point|| 14652.15 K, 26373.87°R|
@ 26.1092 MPa, 257.679 atm
|Heat of fusion||5.640 kJ/mol|
|Heat of vaporization||445.852 kJ/mol|
|Heat capacity|| 0.05689 J/(g•K), 0.10239 J/(g•°R)|
23.403 J/(mol•K), 42.126 J/(mol•°R)
|Universe (by mass)|| Relative: 8.45 × 10−34|
Absolute: 2.83 × 1019 kg
Faradium is the fabricated name of a hypothetical element with the symbol Fa and atomic number 148. It was named in honor of Michael Faraday (1791–1867), who pioneered experiments of electricity and magnetism and invented electric motor. This element is known in the scientific literature as unquadoctium (Uqo), eka-curium, or simply element 148. Faradium is the eighth member of the dumaside series, found in the third row of f-block (below gadolinium and curium); this element is located in the periodic table coordinate 6f8.
Faradium is a soft, brittle, lustrous teal metal. Its molar volume is 35.93 cm3/mol and its molar mass is 411.41 g/mol; dividing molar mass by molar volume yields a density of 11.45 g/cm3. The sound travels through this metal at 3.1 mi/s and the crystals form tetragonal shape. The average atomic separation in the lattice is 3.91 Å (391 pm).
Faradium has a low melting point like lead but its boiling point is one of the highest, which produces an exceptionally high liquid ratio and wide liquid range. This metal can be melted using soldering iron (607 K, 633°F), but it requires the surface temperature of the Sun to boil it (5510 K, 9459°F). With the liquid ratio of 9.08, faradium is the only element with a higher liquid ratio than gallium (8.18), a metal that can be melted in the person's hand. It also has the widest liquid range of any element, which is the difference of 4903 K (8826°F) between its melting point and boiling point. How does metal have such a high boiling point for such a low melting point? The answer is that van der Waals attraction between faradium atoms in the crystal lattice is weak but the metallic bondings between atoms in the liquid is extremely strong caused by interplay between full 6f5/2, half-filled 7d3/2, and outermost shell containing full 8s and 8p1/2 orbitals. Despite its highest liquid ratio, its triple point pressure is the third lowest to gallium and avogadrium, 2.56 × 10−30 pascals.
Faradium is attracted by an externally applied magnetic field, a property called paramagnetism. Faradium becomes ferromagnetic when cooled to below 203 K (−94°F), which is the ability to create its own magnetic field like iron.
Faradium atomically contains 556 component particles (148 protons, 260 neutrons, 148 electrons). Faradium atom masses 411.4 daltons, four times that of silver atom. It has a 129 pm radius with 8 shells. There are six electrons in the 6f orbital behind the filled 5g orbital, as well as two in the 7d and two in the 8p1/2. Electrons in the last five orbitals are in resonance, meaning it has 18, 6, 2, 2, and 2 electrons in order of increasing distance from the nucleus. The resonance ratios are 3:1, 3:1, 1:1, and 1:1. This unique multiple resonances and ratios partly give rise to its highest liquid ratio of any element.
148Fa → 2 184
74W + 40 1
All other isotopes have half-lives less than 4 seconds. There are several meta states of faradium like every element beyond calcium. The longest-lived is 406mFa with a half-life of 42 minutes, 21 times more stable than the most stable ground state isotope. 406mFa undergoes fission like its parent ground state isotope.
Faradium is fairly an unreactive element because of its high ionization energy and high electronegativity. As a result, faradium is stable in the air and even in hot water and strong acids. Chemically, this element is not eka-curium despite it lies right below curium on the periodic table. It shows +2 and +4 oxidation states in compounds with +2 more common, especially in solutions. Faradate (FaO2−
2) is an oxoanion of faradium.
Faradium forms two-element compounds with hydrogen, nitrogen, phosphorus, oxygen, sulfur, fluorine, and chlorine: FaH2 or FaH4, Fa3N2 or Fa3N4, Fa3P2 or Fa3P4, FaO or FaO2, FaS or FaS2, FaF2 or FaF4, and FaCl2 or FaCl4, respectively.
Faradium can also form compounds with more than two elements, including FaSO4 (white with slight pinkish tinge), Fa(BH4)2 (brown-tan), Fa(CN)2 (white crystals), and FaOF2 (white). Sodium faradate (Na2FaO3) is a red powder with a melting point of 1332°F; lead faradate (PbFaO3) is a reddish brown powder with a melting point of 1180°F. This element can even form organic compounds of faradium, called organofaradium; an example is tetraethylfaradium ((CH3CH2)4Fa), which is a colorless liquid; its liquid state ranges from −120°F to 287°F.
Occurrence and synthesis Edit
It is almost certain that faradium doesn't exist on Earth at all, but it is believe to exist somewhere in the universe, at least barely. Since every element heavier than lithium were produced by stars, then faradium must be produced in stars, and then thrown out into space by exploding stars. But it is theoretically impossible for even the most powerful supernovae or most violent neutron star collisions to produce this element through r-process because there's not enough energy available or not enough neutrons, respectively, to produce this hyperheavy element. Instead, this element virtually can only be made by advanced technological civilizations. An estimated abundance of faradium in the universe by mass is 8.45 × 10−34, which amounts to 2.83 × 1019 kilograms.
To go along with other such civilizations, humans on Earth may eventually have the capability to synthesize faradium. To synthesize most stable isotopes of faradium, nuclei of a couple lighter elements must be fused together, and right amount of neutrons must be seeded. This operation would be extremely difficult since it requires a vast amount of energy. Here's couple of example equations in the production of the most stable isotope, 408Fa.