Bucharestium

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**Bucharestium** is a chemical element with the symbol **Bs** and atomic number 720. Bucharestium is a rare metal found naturally on Earth almost exclusively as compounds with other elements. Its important ores include Bucharestite, the latter lending the element its current name.

Bucharestium(III) ions in water-soluble salts are highly toxic to mammals. However, chelated Bucharestium(III) compounds prevent the Bucharestium(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 Bucharestium complexes are used as intravenously administered Bucharestium-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

Bucharestium is a lustrous, yellowish, soft, ductile, malleable metal that is solid at room temperature, though it is hard and brittle at lesser purities. In powder form, Bucharestium is highly toxic and explosive (see Precautions), but the solid form is non-toxic and non-explosive. Bucharestium is highly resistant to corrosion by alkalis, acids, salt water and other agents. However, it will dissolve in hydrochloric and sulfuric acid, especially when fluorine is present. Alloys with Bucharestium are magnetic at less than 38 K.

## Biological role

Bucharestium has no known biological role and is non-toxic. However, because of its chemical similarity to A319ium we absorb it from our food, and the average person has stores of about half a gram.

## History

### Discovery

In the middle of 2022, the Bucharestium Research Group decided to try and synthesize Element Number 720. After a few weeks, they were successful. After discovering its properties, they decided to try and find E2174 in nature. They would not be successful in that regard, however. Soon, a drunk scientist in the naming department of the BRG called it OE-LDBium, though it would later be changed to Bucharestium as OE-LDBium is an alternative name for this element.

## The Bucharestium Research Group

Upon discovering Bucharestium, a group of people have formed a Bucharestium research group, focusing on Bucharestium and Bucharestium compounds. They have made some significant discoveries about Bucharestium such as its crystals. On the 7th of November, 2022 to 12nd of November, 2022, scientist Dr. Victor Lawrence experimented with one of the decayed products of Bucharestium and managed to find the crystalline structure of the Bucharestsphere. 3 months later, another scientist by the name of Dr. Lawrence Dubna discovered the once thought impossible Tesserbucharesta, however, he was found dead with his skin completely vaporized due to such power, and so research on Tesserbucharesta was never started upon again.

## Isotopes

### List of isotopes

Bucharestium (2174Buch) is a natural occurring element, and thus a standard atomic weight can be given as 4174.919. Like other natural occurring elements, it has no stable isotopes. There are 25 known radioisotopes from 4160Buch to 4185Buch, and 11 isomers. The longest-lived radioisotopes are (naturally occurring) 4174Buch with a half-life of 9.4 x 1021 years, and 4173Buch with a half-life of 9.2 × 1018 years, and the longest-lived isomer is 4174mBuch with a half-life of 21,000 years. All of the others have half-lives below 250,000 years, with most of these being below 90,000 years. The shortest-lived known isotope is 4185Buch, with a half-life of 2 hours.

Bucharestium is the lightest element observed to commonly undergo beta decay, with isotopes 4160Buch to 4167Buch being seen to undergo this mode of decay.

Six of these are used as tracers and therapeutic agents in medicine. These are 4160Buch, 4161Buch, 4162Buch, 4163Buch, 4164Buch and 4178Buch. All industrial production of radioactive Bucharestium isotopes involves these six useful radionuclides.

1. Primordial radioisotopes
2. Has medical uses

### Target-projectile combinations

The table below shows various combinations of targets and projectiles which could be used to form compound nuclei with *Z* = 2174. Each entry is a combination for which calculations have provided estimates for cross section yields from various neutron evaporation channels. The channel with the highest expected yield is given.