Moscovium (Mc)
“Element 115, named for the Moscow region, first flickered into existence in 2003 as a few atoms born from americium and an exotic calcium beam.”
How its electrons are arranged
Computed from the aufbau principle, with known real-world exceptions applied automatically.
Characteristics
- A synthetic superheavy element built one atom at a time — barely a hundred moscovium atoms have ever existed in all of history.
- Its atoms live less than a second: the longest-lived isotope, Mc-290, survives only about 0.65 seconds before alpha decay.
- Relativity stabilises its 7p₁/₂ electrons so strongly that moscovium may prefer the +1 oxidation state — almost unheard of in Group 15, where −3 and +3 are the family habit.
- Calculations picture a dense, silvery metal heavier than lead in every sense — yet so short-lived that no bulk sample can ever be collected or seen.
Moscovium has never been seen, weighed or bottled — only its decay flashes have been counted. Theory predicts a dense, soft, silvery post-transition metal sitting below bismuth in Group 15, though every atom vanishes too quickly for any chemical experiment yet attempted.
Where you meet it
✦ Uses
- Its decay chains act as genealogical proof for three elements at once — moscovium chains pass through flerovium down to known nuclei, anchoring the discoveries of 113, 114 and 115 together.
- Each new isotope, from Mc-287 to Mc-290, tests how nuclear stability rises on the slopes of the predicted island of stability near Z = 114.
- A proving ground for relativistic chemistry: predictions of an unusual +1 state in moscovium guide how single-atom experiments on its neighbours should be designed.
- The americium-target technique refined for moscovium paved the way for the berkelium targets that later delivered tennessine.
◍ Everyday examples
- The 2016 naming announcement — four elements named together — ran in newspapers and on TV bulletins worldwide, and periodic tables everywhere, Bangladesh included, changed overnight.
- Science olympiads and quiz competitions in Bangladesh ask which element honours the Moscow region: element 115, moscovium, is the answer.
- The NCTB periodic chart lists all 118 known elements — moscovium is the fifth box from the end of its seventh row.
History & name
In 2003–04 the Dubna–Livermore team led by Yuri Oganessian bombarded americium-243 with calcium-48 ions and recorded alpha-decay chains from a few atoms of Mc-288 and Mc-287 — chains that ran down through flerovium and ended in nuclei already known, which is how the claim was anchored. Laboratories in Europe and America later reproduced those chains, and IUPAC awarded the discovery to Dubna and Livermore in December 2015. In June 2016 IUPAC announced the four new names nihonium, moscovium, tennessine and oganesson together, making them official in November 2016 — moscovium honouring Moscow Oblast, the Russian region that is home to the Dubna laboratories.