Unbipentium

Unbipentium is a hypothetical (theoretical or imagined) element of the periodic table. It is also known as eka-neptunium.

Unbipentium,  ₁₂₅Ubp

General properties
Unbipentium in the periodic table
Hydrogen Helium Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon Sodium Magnesium Aluminium Silicon Phosphorus Sulfur Chlorine Argon Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Iron Cobalt Nickel Copper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Silver Cadmium Indium Tin Antimony Tellurium Iodine Xenon Caesium Barium Lanthanum Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium Lutetium Hafnium Tantalum Tungsten Rhenium Osmium Iridium Platinum Gold Mercury (element) Thallium Lead Bismuth Polonium Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium Fermium Mendelevium Nobelium Lawrencium Rutherfordium Dubnium Seaborgium Bohrium Hassium Meitnerium Darmstadtium Roentgenium Copernicium Nihonium Flerovium Moscovium Livermorium Tennessine Oganesson Template:Periodic table (32 columns, micro)/119+ − ↑ Ubp ↓ (Use) unbiquadium ← Unbipentium → unbihexium
Atomic number (Z)	125
Group	unknown group
Period	period 8
Block	g-block
Element category	superactinide
Electrons per shell	2, 8, 18, 32, 33, 20, 8, 4
Physical properties
Phase at STP	Ubp:
Atomic properties
Oxidation states	(+1), (+6), (+7) (predicted)
Other properties
Natural occurrence	Ubp:
Main isotopes of Unbipentium
Iso­tope Abun­dance Half-life (t1/2) Decay mode Pro­duct 332Ubp syn

The atomic number of this element is 125. It has the symbol Ubp. The name Unbipentium and the symbol Ubp are temporary IUPAC names. This name and symbol exist until a permanent name is decided. It is expected to be a g-block element and an superactinides. It is the sixth element in the eighth period of the periodic table.

The synthesis of unbipentium was first attempted in 1977 by bombarding a target of Americium-238 with zinc-65 ions at the GSI Helmholtz Centre for Heavy Ion Research in Darmstadt, Germany:

• ²⁴³Am + ^66,68Zn → ^309,311Ubp

No atoms were identified.

Unbipentium Media

• 

  Pekka Pyykkö's 172-element (extended) periodic table.

• 

  Kulsha's first suggested form

• 

  Kulsha's second suggested form

• 

  Energy eigenvalues (in eV) for the outermost electrons of elements with Z = 100 through 172, predicted using Dirac–Fock calculations. The − and + signs refer to orbitals with decreased or increased azimuthal quantum number from spin–orbit splitting respectively: p− is p1/2, p+ is p3/2, d− is d3/2, d+ is d5/2, f− is f5/2, f+ is f7/2, g− is g7/2, and g+ is g9/2.

• 

  Energy eigenvalues for the 1s, 2s, 2p1/2 and 2p3/2 shells from solutions of the Dirac equation (taking into account the finite size of the nucleus) for Z = 135–175 (–·–), for the Thomas-Fermi potential (—) and for Z = 160–170 with the self-consistent potential (---).