Structure
Not a diagram of dots on rings — a Monte-Carlo sample of the actual probability density |ψ|² for each occupied subshell. Drag to rotate. Blue and violet mark opposite signs of the wavefunction, which is what makes bonding possible.
Measured values
Every bar shows where moscovium sits among all 118 elements for that property.
Sources: IUPAC 2021 standard atomic weights · CRC Handbook of Chemistry and Physics · NIST. Values marked ~ are predicted rather than measured.
Size, to scale
Radius 247 pm — that is 0.247 nm, so about 2024 million of them side by side would span a millimetre.
Thermal range
Moscovium is liquid over a 430 K window, from 670 K to 1100 K.
The story
Its decay chain provided crucial confirming evidence for the discovery of nihonium.
International Collaboration Success: Moscovium discovery resulted from unprecedented cooperation between Russian and American scientists, demonstrating how scientific collaboration can overcome political boundaries to achieve remarkable breakthroughs in fundamental research.
Decade of Systematic Research: The moscovium discovery spanned a decade of careful experimentation from 2003 to 2013, requiring continuous refinement of synthesis techniques, target preparation methods, and particle detection systems to achieve reproducible results.
JINR Leadership: Led by Yuri Oganessian at the Joint Institute for Nuclear Research in Dubna, Russia, the discovery team combined Russian expertise in heavy-ion physics with American capabilities in target material preparation and analysis techniques.
Oak Ridge Contributions: Oak Ridge National Laboratory provided crucial americium-243 target materials and analytical support, demonstrating how specialized facilities must cooperate to achieve superheavy element synthesis goals.
Technical Innovation: Creating moscovium required developing new ion beam optimization techniques, improved target cooling systems, and more sensitive particle detection methods that advanced the entire field of nuclear physics research.
IUPAC Recognition: The International Union of Pure and Applied Chemistry officially recognized the discovery in 2015, granting naming rights to the discovery team. "Moscovium" honors the Moscow region, home to JINR.
Scientific Legacy: Moscovium's discovery provided crucial validation of theoretical predictions about superheavy element synthesis and opened new pathways toward creating even heavier elements in the quest to reach the island of stability.
Applications
Superheavy Element Synthesis Pathway: Moscovium serves as a crucial intermediate in creating even heavier elements, particularly elements 117 and 118. Its formation through calcium-48 bombardment of americium-243 provides insights into optimal reaction conditions for pushing the periodic table's boundaries further.
Alpha Decay Chain Studies: Moscovium research focuses on understanding complex decay chains that reveal information about nuclear stability patterns. Each moscovium atom that decays provides valuable data about the nuclear forces governing superheavy element behavior.
Relativistic Effects Investigation: As element 115, moscovium offers unique opportunities to study how relativistic electron orbital effects influence chemical bonding in superheavy elements. Theoretical predictions suggest moscovium might exhibit unexpected chemical properties due to these quantum mechanical effects.
Nuclear Shell Model Validation: Moscovium research tests theoretical models predicting enhanced stability for nuclei with specific proton and neutron numbers. Understanding these "magic numbers" could guide discovery of longer-lived superheavy elements.
Advanced Detection Technology: Creating and identifying moscovium requires the most sophisticated particle detection systems available, driving innovation in nuclear instrumentation that benefits multiple scientific fields from medical imaging to space exploration.
International Research Coordination: Moscovium experiments exemplify global scientific collaboration, with teams from Russia, the United States, and other nations sharing resources and expertise to achieve common goals in fundamental nuclear physics.
Future Applications Foundation: While currently limited to research, moscovium studies contribute to the long-term scientific goal of discovering stable superheavy elements that might revolutionize technology in currently unimaginable ways.
Particle Accelerator Experiments: Moscovium exists only within highly specialized research facilities equipped with powerful cyclotrons capable of accelerating calcium-48 ions to extreme energies. Creating moscovium requires months of continuous operation to produce just a few atoms.
Nuclear Reaction Mechanism Studies: Scientists use moscovium synthesis to understand heavy-ion fusion processes and nuclear reaction dynamics at energies near the Coulomb barrier, advancing theoretical knowledge of nuclear physics fundamentals.
Computational Model Testing: Moscovium provides experimental data to validate quantum mechanical calculations of atomic structure, particularly theories about electron behavior under extreme nuclear charges and relativistic conditions.
Advanced Instrumentation Development: Moscovium detection drives innovation in particle identification systems, timing electronics, and data acquisition methods that benefit broader scientific research including materials science and medical physics.
Graduate Student Training: Moscovium experiments provide invaluable training opportunities for nuclear physics students and early-career researchers, advancing human expertise in superheavy element science and nuclear instrumentation techniques.
International Scientific Exchange: Moscovium research facilitates collaboration between world-leading nuclear physics laboratories, fostering knowledge sharing and technological advancement across international boundaries.
Where it comes from
0 mg/kg of Earth's crust · more abundant than 0% of elements
No Natural Existence: Moscovium cannot form through any natural nuclear processes occurring in the universe. Its 115-proton nucleus is far too heavy and unstable to exist in stellar environments, supernovae, or neutron star mergers under current cosmic conditions.
Exclusively Laboratory Creation: Every moscovium atom has been artificially created through nuclear fusion reactions in particle accelerators. The process requires bombarding americium-243 targets with calcium-48 ions, achieving success rates of only a few atoms per week.
Cosmic Absence: Even the most extreme astrophysical environments lack the precise conditions necessary to create and preserve moscovium nuclei. The element's short half-life ensures that any hypothetically formed moscovium would decay before detection.
Specialized Facility Requirement: Moscovium exists only in advanced nuclear physics laboratories like the Joint Institute for Nuclear Research in Russia and Oak Ridge National Laboratory in the United States, representing humanity's most sophisticated nuclear research capabilities.
Fundamental Nuclear Instability: Moscovium's synthetic nature stems from basic nuclear physics principles. As proton number increases beyond natural limits, electromagnetic repulsion between protons overwhelms the strong nuclear force that holds atomic nuclei together.
Future Production Potential: While improved accelerator technologies might enhance moscovium synthesis efficiency, the element will always remain artificial due to its inherent nuclear instability and tendency toward rapid radioactive decay.
Handling
Moscovium is radioactive. It has no stable isotope — every nucleus decays. Handling requires appropriate shielding and licensing.
Intense Alpha Emission: Moscovium undergoes rapid alpha decay with half-lives measured in milliseconds, emitting extremely high-energy alpha particles capable of delivering lethal radiation doses within seconds. Even microscopic quantities pose severe health hazards.
Comprehensive Shielding Required: All moscovium research occurs within heavily shielded particle accelerator facilities featuring multiple containment barriers, remote handling systems, and continuous radiation monitoring to protect personnel from dangerous exposure.
Complex Decay Chains: Moscovium decay produces multiple radioactive daughter nuclei, each presenting additional radiation risks. Complete decay chain analysis is essential for proper safety planning and containment system design.
Specialized Personnel Only: Moscovium research requires nuclear physicists with extensive radiation safety training and years of experience handling extremely radioactive materials. Strict access controls ensure only qualified personnel enter research areas.
Remote Operation Mandatory: Moscovium's extreme radioactivity makes direct handling impossible. All synthesis, detection, and analysis occur through sophisticated remote-controlled systems designed to maximize safety while enabling scientific investigation.
Environmental Monitoring: Despite extremely small quantities produced, moscovium research facilities maintain rigorous environmental monitoring and radioactive waste management protocols to prevent any contamination from escaping containment systems.
Quick answers
Moscovium (symbol Mc) is element 115 on the periodic table, a post-transition metal in period 7, group 15. Its decay chain provided crucial confirming evidence for the discovery of nihonium. At room temperature it is a solid, and it is radioactive.
[Rn] 5f¹⁴ 6d¹⁰ 7s² 7p³, giving 7 occupied shells holding 2, 8, 18, 32, 32, 18, 5 electrons respectively. Its outer shell holds 5 electrons, which is what sets its bonding behaviour.Moscovium melts at 670 K (396.9 °C) and boils at 1100 K (826.9 °C).
Moscovium has no stable isotope, so it has no standard atomic weight. The figure quoted, 288, is the mass number of its longest-lived known isotope.
Moscovium has a density of 13.5 g/cm³. Water is 1.0 g/cm³, so a block of moscovium is about 13.5× heavier.
Moscovium was discovered in 2003 by JINR Dubna & Livermore. It is named after the Moscow region.
Moscovium does not occur naturally on Earth in any meaningful quantity — it is made in a reactor or an accelerator.
Yes. Moscovium has no stable isotope — every one of its nuclei decays. It does not occur in usable quantities in nature and must be synthesised.