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Hundium (160Hu)
Pronunciation /'hun•dē•(y)üm/
Name in Saurian Xidtaim (Xi)
Systematic name Unhexnilium (Uhn)
Location on the periodic table
Period 8
Coordinate 7d6
Above element Hassium (108Hs)
Below element ––
Previous element Vanderwaalsium (159Vw)
Next element Fraunhoferium (161Fh)
Family Iron family
Series Vanthoffide series
Atomic properties
Atomic mass 460.8255 u, 765.2187 yg
Atomic radius 204 pm, 2.04 Å
Van der Waals radius 246 pm, 2.46 Å
Subatomic particles 617
Nuclear properties
Nucleons 457 (160 p+, 297 n0)
Nuclear ratio 1.86
Nuclear radius 9.21 fm
Half-life 2.8801 h
Electronic properties
Electron notation 160-9-25
Electron configuration [Mc] 5g18 6f14 7d5 8s2 8p2 9s1
2, 8, 18, 32, 50, 32, 13, 4, 1
Oxidation states −1, 0, +1, +2, +3, +4,
+5, +6, +7, +8, +10
(strongly basic oxide)
Electronegativity 0.82
First ionization energy 428.5 kJ/mol, 4.441 eV
Electron affinity 88.4 kJ/mol, 0.916 eV
Covalent radius 209 pm, 2.09 Å
Physical properties
Bulk properties
Molar mass 460.825 g/mol
Molar volume 12.695 cm3/mol
Density 36.300 g/cm3
Atomic number density 1.31 × 1021 g−1
4.74 × 1022 cm−3
Average atomic separation 276 pm, 2.76 Å
Speed of sound 4757 m/s
Magnetic ordering Paramagnetic
Crystal structure Simple cubic
Color Purplish gray
Phase Solid
Melting point 571.10 K, 1027.98°R
297.95°C, 568.31°F
Boiling point 2233.50 K, 4020.30°R
1960.35°C, 3560.63°F
Liquid range 1662.40 K, 2992.33°R
Liquid ratio 3.91
Triple point 571.10 K, 1027.99°R
297.95°C, 568.32°F
@ 1.6875 nPa, 1.2657 × 10−11 torr
Critical point 6155.40 K, 11079.72°R
5882.25°C, 10620.05°F
@ 86.3590 MPa, 852.300 atm
Heat of fusion 5.117 kJ/mol
Heat of vaporization 189.512 kJ/mol
Heat capacity 0.05560 J/(g•K), 0.10008 J/(g•°R)
25.623 J/(mol•K), 46.122 J/(mol•°R)
Universe (by mass) Relative: 2.18 × 10−35
Absolute: 7.31 × 1017 kg

Hundium is the fabricated name of a hypothetical element with the symbol Hu and atomic number 160. Hundium was named in honor of Friedrich Hund (1896–1997), who governed the electron configurations with maximum multiplicity (known as Hund's rules). This element is known in the scientific literature as unhexnilium (Uhn), dvi-osmium, or simply element 160. Hundium is the heaviest member of the iron family (below iron, ruthenium, osmium, and hassium) and is the sixth member of the vanthoffide series; this element is located in the periodic table coordinate 7d6.

Properties Edit

Physical Edit

At ordinary conditions, hundium is a purplish gray metal that is ductile, malleable, and lustrous. With the density of 36.3 g/cm3, the element is 1.7 times denser than the other family member platinum (21.45 g/cm3). Hundium atoms forming cubic crystals are close together, at an average distance of just 276 picometers between atoms. Consequently, there are a lot of atoms in one cubic centimeter (47.4 sextillion) of metal compared to other elements.

Like most other metals, hundium is solid at room temperature (298 K, 537°R), most with melting points above 1000 K (1800°R). However the melting point of this metal is only 571 K (1028°R), which is very unlike other elements of the iron family due to its unique electron configuration featuring an electron in the 9s orbital beyond five-electron 7d orbital and two-electron 8p orbital. The boiling point is almost four times higher than its melting point, at 2234 K (4020°R).

Atomic Edit

Because of the extreme relativistic effectss, an electron is occupying in the 9s orbital, even though it is a period 8 element. It has 160 electrons in 9 shell and 25 orbitals. Because it has so many shells and orbitals, the atom must be large, but because of the electric forces between so many electrons and so many protons, the atom only measures 134 picometers, almost identical in size to iodine atom, whose radius is 133 pm.

Hundium's atom masses 461 daltons, calculated by adding masses of all of the atomic components altogether. 99.98% of all mass are concentrated in the nucleus, which is tiny compared to the size of the atom. Also the nucleus contains most of atomic particles (at 74%), albeit much more moderate than mass and size of nucleus relative to atom. There are two types of particles that make up the nucleus, protons and neutrons. The nucleus has a ratio of 1.86, meaning it contains 86% more neutrons (297) than protons (160).

Isotopes Edit

Like every other element heavier than lead, hundium has no stable isotopes. The most stable isotope is 457Hu with an unusually long fission half-life of 2.88 hours.

Hu → 282
Hs + 130
Te + 45 1
Hu → 2 193
Ir + 12
C + 59 1

This element is near the center of the "second island of stability." Another isotope, 453Hu, has a half-life of 1.35 hours. All of the remaining isotopes have half-lives less than 20 minutes and the majority of these have half-lives less than 20 seconds. Hundium has isomers like more than 90% of elements on the 172-element periodic table. The most stable isomer has a half-life of 2.5 seconds for 454mHu, about 14000 the half-life of 457Hu. 456mHu has a half-life of 403 milliseconds and 459mHu has a half-life of 13 milliseconds. Every other isomers have half-lives less than a millisecond.

Chemical Edit

Hundium's most stable oxistate is +1 due to its readiness to give up the only electron in the ninth shell, thus hundium would most commonly form monovalent compounds. There are few other stable states, +2 means giving up the only electron in the 7d5/2 suborbital in addition to in +1 to achieve amperium's electron configuration, +3 means giving up both 8p1/2 suborbital and +1, and +4 means giving up all electrons mentioned. There are higher stable states, +6 and +8. As a result, hundium would have chemical properties similar to alkali metals. Its electronegativity is 0.82 and first ionization energy 4.4 eV, thus making hundium a very reactive element unlike all the lighter cogeners. It would quickly tarnish when exposed to air and would burn brilliant orange when in powdered form. It would react very readily with mineral acids to form salts and with water to form a strong base. When dissolved, it most easily dissociates into hundium (Hu+) ions forming light pink solution.

Compounds Edit

Examples of oxides are Hu2O, HuO, HuO3 and HuO4. The carbides are Hu4C, Hu2C, Hu2C3 and HuC2. HuCO3 is a white powder form which can be made when hundium(II) oxide reacts with carbon dioxide. Hundium can form halides, the most stable is monohalides, which are HuF, HuCl, HuBr, and HuI. These compounds are ionic comprising of Hu+ and X.

Hundium salts include Hu2SO4, HuNO3, and Hu2CO3. These form when the metal reacts with corresponding acids. Hu2SO4 can be reduced to Hu2S by heating it with carbon to 1100 K (2000°R).

Hu2SO4 + 2 C → Hu2S + 2 CO2

Hundium sodium zinc carbon oxide (HuNa2Zn3CO11) is a superconductor if its below 268 K (−5°C, 23°F, 483°R), very near the freezing point of water.

Like almost every other element, hundium can form organic compounds, called organohundium. Examples are Hu(CO)8 (hundium octacarbonyl), Me4Hu (methylhundium), HuC6H5O7 (hundium citrate), and C4H8Cl2Hu (bis(2-chloroethyl)hundium).

Occurrence and synthesis Edit

It is almost certain that hundium 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 hundium 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 hundium in the universe by mass is 2.18 × 10−35, amounting to 7.31 × 1017 kilograms.

To go along with other such civilizations, humans on Earth may eventually have the capability to synthesize hundium. To synthesize most stable isotopes of hundium, 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 and even if nuclei of this element were produced would immediately decay due to its brief half-life. Here's couple of example equations in the production of the most stable isotope, 457Hu.

Ac + 175
Lu + 55 1
n → 457
Lv + 102
Ru + 50 1
n → 457
Periodic table
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
1 H He
2 Li Be B C N O F Ne
3 Na Mg Al Si P S Cl Ar
4 K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr
5 Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe
6 Cs Ba La Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn
7 Fr Ra Ac Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr Rf Db Sg Bh Hs Mt Ds Rg Cn Bc Fl Lz Lv J Mc
8 Nw Gl * Du Bu Ab Sh Hi Da Bo Fa Av So Hr Wt Dr Le Vh Hk Ke Ap Vw Hu Fh Ma Kp Gb
9 Ps Hb Kf Bn Ju Hm Bs Rs
* Ls Dm Ms Ts Dt Mw Pk By Bz Fk Dw To Pl Ah My Cv Fy Ch An Ed

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