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Symbol So
Atomic number 150
Pronunciation /'shrō•dē•(y)üm/
Named after Erwin Schrödinger
Name in Saurian Jsxetaim (Je)
Systematic name Unpentnilium (Upn)
Location on the periodic table
Period 8
Family Gadolinium family
Series Dumaside series
Coordinate 6f8
Element above Schrodium Curium
Element left of Schrodium Avogadrium
Element right of Schrodium Hertzium
Atomic properties
Subatomic particles 569
Atomic mass 422.5046 u, 701.5854 yg
Atomic radius 129 pm, 1.29 Å
Covalent radius 138 pm, 1.38 Å
van der Waals radius 187 pm, 1.87 Å
Nuclear properties
Nucleons 419 (150 p+, 269 no)
Nuclear ratio 1.79
Nuclear radius 8.94 fm
Half-life 5.6954 ms
Decay mode Spontaneous fission
Decay product Various
Electronic properties
Electron notation 150-8-24
Electron configuration [Og] 5g18 6f7 7d3 8s2 8p2
Electrons per shell 2, 8, 18, 32, 50, 25, 11, 4
Oxidation states +1, +2, +3, +4, +5, +6, +7
(a weakly basic oxide)
Electronegativity 2.22
First ionization energy 898.8 kJ/mol, 9.316 eV
Electron affinity 11.3 kJ/mol, 0.117 eV
Physical properties
Bulk properties
Molar mass 422.505 g/mol
Molar volume 44.176 cm3/mol
Density 9.564 g/cm3
Atomic number density 1.43 × 1021 g−1
1.36 × 1022 cm−3
Average atomic separation 419 pm, 4.19 Å
Speed of sound 4582 m/s
Magnetic ordering Paramagnetic
Crystal structure Hexagonal
Color Green
Phase Solid
Thermal properties
Melting point 464.10 K, 835.37°R
190.95°C, 375.70°F
Boiling point 917.75 K, 1651.95°R
644.60°C, 1192.28°F
Liquid range 453.65 K, 816.57°R
Liquid ratio 1.98
Triple point 463.88 K, 834.98°R
190.73°C, 375.31°F
@ 2.2388 kPa, 16.792 torr
Critical point 4894.52 K, 8810.13°R
4621.37°C, 8350.46°F
@ 6308.7669 MPa, 62262.885 atm
Heat of fusion 4.181 kJ/mol
Heat of vaporization 104.591 kJ/mol
Heat capacity 0.05814 J/(g•K), 0.10465 J/(g•°R)
24.565 J/(mol•K), 44.217 J/(mol•°R)
Abundance in the universe
By mass Relative: 9.10 × 10−33
Absolute: 3.05 × 1020 kg
By atom 5.66 × 10−34

Schrodium is the provisional non-systematic name of a theoretical element with the symbol So and atomic number 150. Schrodium was named in honor of Erwin Schrödinger (1887–1961), who developed his equation for quantum mechanics. This element is known in the scientific literature as unpentnilium (Upn), eka-curium, or simply element 150. Schrodium 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.

Atomic properties Edit

Schrodium atom is comprised of 569 subatomic particles, 419 of these make up the nucleus (protons and neutrons), while the remaining 150 are found surrounding the nucleus (electrons). The atomic mass is 422.5 daltons, twice as heavy as astatine atom; its radius is 129 picometers, similar in size to copper atom.

The electron configuration is inconsistent with what the periodic table would tell, the f-orbital contains just seven electrons while the three missing electrons are in the d-orbital.

Isotopes Edit

Like every other element heavier than lead, schrodium has no stable isotopes. The longest-lived isotope is 419So with a fission half-life of 5.7 milliseconds.

So → 232
Th + 142
Sm + 45 1
So → 192
Os + 137
Ba + 36
Ar + 54 1

Schrodium has meta states, which are excited states of isotopes. The longest lived meta state has a half-life of 380 milliseconds for 420m1So, 66.6 times longer than the longest-lived ground-state isotope 419So.

Chemical properties and compounds Edit

Schrodium is lot less reactive than curium because electrons between 8s and 8p1/2 orbitals are bound, resulting in higher ionization energies, thus making it hard to form compounds. The common oxidation states for schrodium are +5 (pentavalent) and +6 (hexalent), compared to +3 (trivalent) for curium. In aqueous solutions, So6+ (dark blue) is more stable than So5+ (green).

Schrodium compounds are rare since it is so unreactive. Still, schrodium can form halides since halogens are the most reactive group of elements that can combine with metals. Examples of halides are schrodium heptafluoride (SoF7), schrodium hexafluoride (SoF6), hexachloride (SoCl6), and pentachloride (SoCl5). Schrodium can possibly form other compounds, such as So2O7, SoO3, So2CO3, and So3PO4.

Schrodium can react with carbon, along with hydrogen, oxygen, and/or others to form organic compounds involving schrodium, called organoschrodium. One example is dimethylschrodium (So(CH3)2), a colorless liquid with a freezing point of 473°R (−10°C) and boiling point of 826°R (186°C).

Physical properties Edit

Schrodium, even as a metal, is not gray, white, gold, reddish, nor bluish, but green. The metal appears green because electrons exchange energies at frequencies that would put at green region of the spectrum at around 525 nanometers.

Its density is 9.56 g/cm3, which is about average for a metal. One mole of schrodium weighs 422.5 grams or about 15 ounces. The sound travels through thin rod of metal at 4582 m/s, little above average for an element. Schrodium has a hexagonal crystal lattice, formed when atoms arrange together to form unique shapes. One cubic centimeter of schrodium contains 13.6 sextillion atoms, and separated by an average of 419 pm (4.19 Å) apart.

Schrodium's phase points are much lower than neighboring elements due to closed orbitals and split orbitals including 6f5/2 suborbital. It melts at 835°R (191°C) and boils at 1652°R (645°C). However, melting and boiling points are not the same at every condition as pressure is the variable. Melting and boiling points given here are from Earth's atmospheric pressure at sea level, 101.325 kPa or 1 atm, which is the default pressure when determining phase points of elements, compounds, and mixtures. If we put schrodium in low pressure environment, both phase points would be lower, but boiling point would decrease far more rapidly with the same amount of decrease in pressure. Because of this, boiling point would catch up to the melting point, and when both phase points are identical in temperature, it is called a triple point. For schrodium, triple point is at a pressure of 2.24 kPa, 145 the Earth's sea level pressure. In conclusion, if we decrease pressure applied on schrodium 45 times, from default pressure to triple point pressure, boiling point would lower by 816.58°R (453.87°C), but its melting point would lower by only 0.39°R (0.22°C). If we increase the ambient pressure around schrodium from default pressure by 6309 times, it would exist as supercritical fluid beyond its boiling point. At 6309 atmospheres, its boiling point would be 8810°R (4621°C), while its melting point would be 838°R (192°C). Its liquid range would be 7972°R (4429°C) and its liquid ratio would be 10.52, compared to 817°R (454°C) and 1.98, respectively at default pressure.

Occurrence Edit

It is almost certain that schrodium doesn't exist on Earth at all, but it is believe to barely exist somewhere in the universe due to its brief lifetime. Every element heavier than iron can only naturally be produced by exploding stars. But it is likely 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 can only be produced by advanced technological civilizations, virtually accounting for all of its abundance in the universe. An estimated abundance of schrodium in the universe by mass is 9.10 × 10−33, which amounts to 3.05 × 1020 kilograms or about a third the mass of dwarf planet Ceres worth of schrodium.

Synthesis Edit

To synthesize most stable isotopes of schrodium, nuclei of a couple lighter elements must be fused together, and right amount of neutrons must be seeded. This operation would be impossible using current technology since it requires a tremendous amount of energy, thus its cross section would be so low that it is beyond the technological limit. Even if synthesis succeeds, this resulting element would quickly undergo fission. Here's couple of example equations in the synthesis of the most stable isotope, 419So.

Pa + 141
Pr + 47 1
n → 419
Lr + 107
Ag + 47 1
n → 419
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 Nh Fl Mc Lv Tn Og
8 Nw G * Du Sh Hb Da Bo Fa Av So Hr Wt Dr Le Vh Hk Ke Ap Vw Hu Fh Ma Kp Gb Bc Hi Kf Bn J Hm Bs Rs
* Ls Dm Ms Ts Dt Mw Pk By Bz Fn Dw To Pl Ah My Cv Fy Ch A Ed Ab Bu

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