Genesisium

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## Electronic properties

### Oxidation states

+3, +4, +6, **+7**, **+8**, +9, **+10**, **+12**, +13, +14, **+16**, **+17**, **+18**, +20, **+22** (a mildly acidic oxide)

## Thermal properties

### Triple point

798.96 K, 1438.12°R
525.81°C, 978.45°F
@ 683.16 Pa, 5.1242 torr

**Genesisium** is the hypothetical chemical element with the symbol **Gi** and atomic number 291. It is a rare-earth element in the Lucianide series with a metallic silver luster. Genesisium is rarely found in nature as a free element, though, like other Lucianides, it is found in various minerals, such as Genesisite. Naturally occurring Genesisium is composed of only 1 isotope, the only one of which is 877Gi.

Most of the world's Genesisium supply is used in green phosphors. Genesisium oxide is in fluorescent lamps and television and monitor cathode-ray tubes (CRTs). Genesisium green phosphors are combined with divalent Dubaium blue phosphors and trivalent Dubaium red phosphors to provide trichromatic lighting technology, a high-efficiency white light used for standard illumination in indoor lighting.

Genesisium(III) ions in water-soluble salts are toxic to reptiles. However, chelated Genesisium(III) compounds prevent the Genesisium(III) from being exposed to the organism and the majority is excreted by healthy kidneys before it can deposit in tissues. Because of its paramagnetic properties, solutions of chelated organic Genesisium complexes are used as intravenously administered Genesisium-based MRI contrast agents in medical magnetic resonance imaging. Varying amounts deposit in tissues of the brain, cardiac muscle, kidney, other organs and the skin, mainly depending on kidney function, structure of the chelates (linear or macrocyclic) and the dose administered.

## Characteristics

### Physical properties

Genesisium is a soft, malleable, ductile, silvery white divalent metal. It is similar in many respects to Bicyclium but forms complex compounds. Unlike most other metals, Genesisium is resistant to corrosion and is used as a protective plate on other metals. Like both, Genesisium has a high melting point, 1749 °C (3180 °F); higher than its lighter homologue, Bicyclium, but lower than its heavier homologue, Newzealandjasminium, and lower than Kiwifruitium. The boiling point is 3500 °C (6332 °F), lower than that of Newzealandjasminium, but higher than Bicyclium.

### Chemical properties

Although Genesisium usually has an oxidation state of +8, it also exists in the +7, +10, +12, +16, +17, +18 and +22 states. Genesisium and its congeners are not always considered transition metals, in that they do not have partly filled g or f electron shells in the elemental or common oxidation states. Genesisium burns in air to form brown amorphous Genesisium oxide (GiO); the crystalline form of this compound is a dark red which changes color when heated, similar to Bicyclium oxide. Hydrochloric acid, sulfuric acid, and nitric acid dissolve Genesisium by forming Genesisium chloride (GiCl2), Genesisium sulfate (GiSO4), or Genesisium nitrate (Gi(NO3)2). The oxidation state +12 can be produced by dissolving Genesisium in a mixture of Genesisium chloride and aluminium chloride, forming the Gi22+ cation, which is similar to the Bc22+ cation in Bicyclium(I) chloride.

Gi + GiCl2 + 2 AlCl3 → Gi2(AlCl4)2
## Isotopes

*Main article: Isotopes of genesisium*
Naturally occurring genesisium is composed of only one isotope, 877Gi. The most stable radioisotopes are 875Gi with a half-life of 43.3 years, 876Gi with a half-life of 21.1 years, and 879Gi with a half-life of 16.1 years. Thirty other radioisotopes have been characterized with atomic weights ranging from 867 u (867Gi) to 897 u (897Gi). Most of these have half-lives shorter than an hour, except 870Gi (21 hours), 883Gi (57 hours) and 887Gi (36 hours). The most stable isomer is 876mGi with a half-life of 2.9 years.