|Name in Saurian|| Otajedaim (Ot)|
|Systematic name|| Unquadnilium (Uqn)|
|Location on the periodic table|
|Previous element||Astonium (139An)|
|Next element||Dumasium (141Du)|
|Atomic mass||382.1664 u, 634.6022 yg|
|Atomic radius||143 pm, 1.43 Å|
|Van der Waals radius||167 pm, 1.67 Å|
|Nucleons||379 (140 p+, 239 n0)|
|Nuclear radius||8.65 fm|
|Electron configuration|| [Mc] 5g14 6f3 7d1 8s2 8p2|
2, 8, 18, 32, 46, 21, 9, 4
|Oxidation states|| +2, +4|
(mildly basic oxide)
|First ionization energy||678.5 kJ/mol, 7.032 eV|
|Electron affinity||18.6 kJ/mol, 0.193 eV|
|Covalent radius||169 pm, 1.69 Å|
|Molar mass||382.166 g/mol|
|Molar volume||43.675 cm3/mol|
|Atomic number density|| 1.58 × 1021 g−1|
1.38 × 1022 cm−3
|Average atomic separation||417 pm, 4.17 Å|
|Speed of sound||3575 m/s|
|Crystal structure||Simple hexagonal|
|Melting point|| 347.11 K, 624.80°R|
|Boiling point|| 811.39 K, 1460.50°R|
|Liquid range||464.28 K, 835.70°R|
|Triple point|| 347.11 K, 624.79°R|
@ 76.939 μPa, 5.7709 × 10−7 torr
|Critical point|| 2101.21 K, 3782.17°R|
@ 609.5969 MPa, 6016.272 atm
|Heat of fusion||4.889 kJ/mol|
|Heat of vaporization||95.621 kJ/mol|
|Heat capacity|| 0.05295 J/(g•K), 0.09531 J/(g•°R)|
20.235 J/(mol•K), 36.423 J/(mol•°R)
|Universe (by mass)|| Relative: 7.48 × 10−33|
Absolute: 2.51 × 1020 kg
Edisonium is the fabricated name of a hypothetical element with the symbol Ed and atomic number 140. Edisonium was named in honor of Thomas Edison (1847–1931), who patented electricity and invented electric light bulb, phonograph, and the motion picture camera. This element is known in the scientific literature as unquadnilium (Uqn), or simply element 140. Edisonium is the last element of the lavoiside series and located in the periodic table coordinate 5g20.
Edisonium is a soft, dark gray metal that is slightly brittle. Its molar mass is 382 g/mol and its molar volume is 43.7 cm3/mol. Dividing molar mass by molar volume yields its molar density of 8.75 g/cm3. Molar density is well known simply as density. Edisonium atoms arrange to form hexagonal crystals and sound travel through the metal at a mediocre speed of 3575 m/s.
Edisonium has a low enough melting point to allow boiling water to melt this metal. Its melting point is 165°F (347 K), compared to 212°F (373 K) for the boiling point of water. The metal's boiling point is 1001°F (811 K), low enough for ordinary flames to vaporize this metal, which is 836°F (464 K) above its melting point. Correspondingly, the liquid range of the element is 4.64 times wider than the liquid range of water.
Edisonium's nucleus is comprised of 379 nucleons, hence its mass number. Since this element has the atomic number 140, there must be 140 protons in the nucleus. There are also 239 neutrons, determined by substracting the number of nucleons (379) by its atomic number (140). Atoms are neutral, so there must be 140 electrons in the cloud. There are eight energy levels hence it is a period 8 element. Even though edisonium is the last of the 20-element g-block series, the g-orbital is not completed because electrons are found straying in other orbitals due to orbitals being crammed together causing differences of ground state energies to be small.
Edisonium has the atomic mass of 382.17 daltons, 99.98% of which is located in the nucleus. Its atomic radius, from center of nucleus to outermost shell, is 143 picometers, although its imaginery radius of an atom as a hard sphere like a ball, planet, and star, called its van der Waals radius, is 167 picometers, meaning its boundary is 24 pm further out than its outermost orbital.
Like every other element heavier than lead, edisonium has no stable isotopes. The most stable isotope is 379Ed with a half-life of 11 minutes. It undergoes cluster decay about 68% of the times, emitting 12C and 20Ne to form 339Ts plus 24 neutrons. All other isotopes have half-lives less than 45 seconds, undergoing spontaneous fission. Edisonium has meta states, the longest-lived is much more brief than the longest-lived ground state like most elements, 0.2 seconds for 382mEd.
Edisonium has the Pauling scale electronegativity of over 1½ and first ionization of just over 7 eV, meaning this element has a fair chemical activity. As a pure metal, it slowly darkens when exposed to air and is slightly soluble in water. The metal exhibits +2 and +4 oxistates (+4 is much more common). Examples of compounds that exhibit +4 state of edisonium are EdF4 and EdO2 while compound that exhibits +2 state is EdSiO3. When dissolved in water, Ed2+ is orange while Ed4+ is pink. Edisonium can form complex ions, such as EdF4−
4, and Ed2O2H3+.
EdF4 is an aquamarine ionic solid with the melting point of 343°F (432 K); EdCl4 is a pale blue ionic solid with the melting point of 578°F (562 K); EdBr4 is an aquamarine ionic solid with the melting point of 968°F (793 K); EdI4 is a purplish sky blue crystalline solid with the melting point of 786°F (692 K). EdO2 forms as a coating of metal when it exposes to air, which protects the metal from further oxidation. EdSO4 is an ionic salt obtained when edisonium reacts with less stable sulfates or sulfuric acid.
Compounds that exhibit +2 oxistate of edisonium are usually unstable. EdO is an unstable oxide obtained when EdO2 is heated with pressurized ozone (O3). EdO slowly decomposes at room temperature in the absence of oxygen into its constituents, but when in the presence of oxygen, EdO is quickly oxidized to EdO2. EdO2 hydrolyses in water to form EdO(OH)2, which decomposes by emitting oxygen to form Ed(OH)2.
- 2 EdO2 + 2 H2O → 2 EdO(OH)2 → 2 Ed(OH)2 + O2
EdF2 and EdCl2 are powerful oxidizers. When they react together in the presence of oxygen or water, it forms a double halide called edisonium chlorofluoride (EdClF), which in this compound +2 oxistate for edisonium is far more stable than +4 state. But when individual reactants react with oxygen or water, it forms edisonium oxyhalides EdOF2 and EdOCl2 while increasing oxidation state to +4 for edisonium.
Tetraphenyledisonium ((C6H5)4Ed) and the fluorine homologue tetrafluorophenyledisonium ((C6F5)4Ed) are organoedisonium, organic compounds of edisonium.
Occurrence and synthesis Edit
It is almost certain that edisonium 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 edisonium 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 edisonium in the universe by mass is 7.48 × 10−33, which amounts to 2.51 × 1020 kilograms or about one quarter of Ceres worth of this element in mass.
To go along with other such civilizations, humans on Earth may eventually have the capability to synthesize edisonium. To synthesize most stable isotopes of edisonium, 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, 379Ed.