Element 119-150

**Ununennium**, also known as **eka-francium** or **element 119**, is a hypothetical chemical element; it has symbol **Uue** and atomic number 119. *Ununennium* and *Uue* are the temporary systematic IUPAC name and symbol respectively, which are used until the element is discovered, confirmed, and a permanent name is decided upon. In the periodic table of the elements, it is expected to be an s-block element, an alkali metal, and the first element in the eighth period.

**Unbinilium**, also known as **eka-radium** or **element 120**, is a hypothetical chemical element; it has symbol **Ubn** and atomic number 120. *Unbinilium* and *Ubn* are the temporary systematic IUPAC name and symbol, which are used until the element is discovered, confirmed, and a permanent name is decided upon. In the periodic table of the elements, it is expected to be an s-block element, an alkaline earth metal, and the second element in the eighth period.

**Unbiunium**, also known as **eka-actinium** or **element 121**, is a hypothetical chemical element; it has symbol **Ubu** and atomic number 121. *Unbiunium* and *Ubu* are the temporary systematic IUPAC name and symbol respectively, which are used until the element is discovered, confirmed, and a permanent name is decided upon. In the periodic table of the elements, it is expected to be the first of the superactinides, and the third element in the eighth period.

**Unbibium**, also known as **element 122** or **eka-thorium**, is a hypothetical chemical element; it has placeholder symbol **Ubb** and atomic number 122. *Unbibium* and *Ubb* are the temporary systematic IUPAC name and symbol respectively, which are used until the element is discovered, confirmed, and a permanent name is decided upon. In the periodic table of the elements, it is expected to follow unbiunium as the second element of the superactinides and the fourth element of the 8th period. Similarly to unbiunium, it is expected to fall within the range of the island of stability, potentially conferring additional stability on some isotopes, especially 306Ubb which is expected to have a magic number of neutrons (184).

#### Unbiquadium (E124) [edit]

Further information: Unbiquadium

Scientists at GANIL (Grand Accélérateur National d'Ions Lourds) attempted to measure the direct and delayed fission of compound nuclei of elements with *Z* = 114, 120, and 124 in order to probe shell effects in this region and to pinpoint the next spherical proton shell. This is because having complete nuclear shells (or, equivalently, having a magic number of protons or neutrons) would confer more stability on the nuclei of such superheavy elements, thus moving closer to the island of stability. In 2006, with full results published in 2008, the team provided results from a reaction involving the bombardment of a natural germanium target with uranium ions:

The first and only attempt to synthesize element 125 (unbipentium) was conducted in Dubna in 1970–1971 using zinc ions and an americium-243 target:

#### Unbihexium (E126) [edit]

Further information: Unbihexium

The first and only attempt to synthesize element 126 (unbihexium), which was unsuccessful, was performed in 1971 at CERN (European Organization for Nuclear Research) by René Bimbot and John M. Alexander using the hot fusion reaction:

#### Unbiseptium (E127) [edit]

The first and only attempt to synthesize element 127 (unbiseptium), which was unsuccessful, was performed in 1978 at the UNILAC accelerator at the GSI Helmholtz Center, where a natural tantalum target was bombarded with xenon-136 ions:

### Elements 128-150

UUZ Element 128\_\_\_\_\_\_\_\_\_ UUZU Element 129 -------------- UUZUA Element 130 -------------- UUZUB Element 131 -------------- UUUZA Element 132 -------------- UUUZB Element 133 -------------- UUUUZA Element 134

Unuisdzue ---------------------- Unuisdzueuop -------------- Unuisdueuopalp------------ Unuisdueuopbaled ----------- Unuisusezaltalp-------------- Unuisusezaltbaled---------- ----------------Unuisuseuntozaltalp

UUUUZB Element 135 -------------- UUUUUZC Element 136 -------------- UUUUUZH Element 137 -------------- UUUUUZP Element 138 -------------- UUUUUUZX Element 139 -------------- U₆Z₂W Element 140 U₆Z₂+G₁.₄ Element 141

Unuesuisunzalpbalt -------------- Unuisunuesunzipcod -------------- Unuisunuesunzaphil -------------- Unuillunutnunzipolo -------------- Unuillunutnununzipxi -------------- Unuillunutnununziopzixwio Unuillunutnununziopzixgixᵍ

ᵤ₆.ₜ₂.𝓏₅.ₕ₂ Element 142 -------------- ᵤ₇.ₜ₃.𝓏₇.ₕ₃ Element 143 -------------- ᵤ₇,₁₂₂.ₜ₃,₂₄.𝓏₇,₅.ₕ₄ Element 144 -------------- ᵤ₇,₂₃.ₜ₃,₅₆.𝓏₈.ₕ₅ Element 145 -------------- ᵘ⁷,⁵.ᵗ⁷.ᶻ⁸,⁵.ʰ⁷ Element 146 -------------- ᵤ₈.ₜ₇.𝓏₉.ₕ₁₀ Element 147 -------------- ᵘ¹⁰.ᵗ⁸.ᶻ¹⁰.ʰ¹¹ Element 148

ᵤₙ₉ Element 149 -------------- ᵤₙ₁₀ ₑₙ₃ Element 150