Element / isotope identity
Atomic number, isotope identity and discovery evidence are experimentally/evaluatively grounded.
Electron configuration
Very-heavy-element configurations are theory/evaluation-led; ordinary elements use evaluated ground-state references.
Bulk material structure
No macroscopic crystal lattice is asserted.
Phase / density data
Unknown values stay unknown; reported values are tied to the elemental material reference.
The lens describes evidence status, not confidence theatre. “Unknown” is kept unknown, and teaching schematics are not presented as direct measurements.
Bohrium (Bh)
Bohrium is element 107. This guide connects its periodic-table identity to evidence-aware structure, isotopes, uses, discovery and the search questions learners actually ask.
Bohrium atomic number, mass, electron configuration and key properties
Bohrium: quick answers
How many protons, neutrons and electrons does bohrium have?
Bohrium’s atomic number is 107, so every bohrium atom has 107 protons, and a neutral atom also has 107 electrons. Bohrium has no stable isotopes, so the neutron count depends on the isotope: bohrium-272, featured on this page, has 165 neutrons.
What is the symbol for bohrium?
The chemical symbol for bohrium is Bh.
Is bohrium a solid, liquid or gas at room temperature?
Bohrium has only been made a few atoms at a time, so its state at room temperature is unknown.
What family (group) is bohrium in?
Bohrium is a transition metal (predicted), in group 7, period 7 of the periodic table.
What is the electron configuration of bohrium?
The ground-state electron configuration of bohrium is [Rn] 5f¹⁴ 6d⁵ 7s². This is a predicted configuration; it has not been measured.
From atomic number to chemistry
Read these as a chain of causes, not as isolated facts. Each step links to the concept hub if you want the underlying idea explained.
107 protons define bohrium.
Ground-state/reference configuration frames atomic behavior; heavy-element predictions remain evidence-labelled.
Periodic position organizes trends without replacing element-specific evidence.
The teaching nucleus is one isotope, not the relative atomic mass.
Measured structures are visualized; unknown bulk structures stay unknown.
Bohrium in its period and family
Bohrium is element 107 in Period 7. Its d-block/series position provides useful periodic context, but element-specific experimental evidence takes priority over simple trend extrapolation.
Bohrium Visual Lab
Explore Bh across the teaching nucleus, isolated-atom orbitals, evidence-aware material structure and temperature/evidence views, then connect those models to uses, isotopes, search-led questions and source-backed context.
Every mark points to one exact feature
The numbered markers explain the same information system used throughout Element Lookup. Unknown or predicted fields remain visibly labelled rather than being replaced with guesses.
Bohrium in one minute
Atomic number 107 means every bohrium nucleus has 107 protons.
The ground-state/reference electron configuration is [Rn] 5f¹⁴ 6d⁵ 7s².
The representative teaching isotope is ²⁷²Bh.
Bohrium has experimentally observed nuclear identity and some atom-scale chemical evidence, but no measured bulk density, melting point or crystal lattice. Group-7 expectations are not a license to invent a material.
Material structure status: Bulk crystal structure unknown.
Shell rings organize electron counts. They are not electron trajectories or orbital shapes.
2 · 8 · 18 · 32 · 32 · 13 · 2 electrons
Displayed orbitals are isolated-atom, nonrelativistic teaching probability models. They are not bulk-band structures, bonding orbitals or direct measured electron-density maps; relativistic effects become especially important for very heavy elements.
No defensible macroscopic crystal lattice is displayed for Bohrium. Nuclear/atomic evidence and theory are kept separate from unmeasured bulk material properties.. The viewer is evidence-aware: measured structures are identified as such; unknown bulk structures stay unknown.
Teaching visualization; not a literal finite sample or thermal trajectory.What this model does—and does not—show
Displayed orbitals are isolated-atom, nonrelativistic teaching probability models. They are not bulk-band structures, bonding orbitals or direct measured electron-density maps; relativistic effects become especially important for very heavy elements.
Where do I meet bohrium?
Clickable learning cards connect the element to materials, environment, technology, biology or research - depending on what the evidence actually supports.
Scientific research only
This context uses Bohrium or a bohrium-containing material; the element and its compounds/isotopes are kept distinct.
Evidence ladder: nucleus → atom-scale chemistry → unknown bulk material
For scarce synthetic heavy elements, different claims have very different evidence strength.
Nuclear identity
Production/decay evidence establishes the element and specific isotopes.
Bohrium in periodic context
Compare nearby or family-related elements without treating a periodic trend as a substitute for element-specific evidence.
| Atomic number | 106 |
|---|---|
| Context | neighbor / series |
| Atomic number | 107 |
|---|---|
| Context | neighbor / series |
| Atomic number | 108 |
|---|---|
| Context | neighbor / series |
Bohrium properties: atomic, physical, thermal and chemical
Categories follow the science of this element rather than a fixed decorative template. Each row carries condition/provenance context and an evidence label; unknown values stay unknown.
| Property | Value | Context / provenance | Evidence |
|---|---|---|---|
| Atomic number | 107 | Source-reviewed; see Sources below | Evaluated |
| Relative atomic mass | [270] | Source-reviewed; see Sources below | Evaluated |
| ²⁷²Bh | Reference teaching isotope | Mass number belongs to a specific isotope and is not the same thing as relative atomic mass. | Evaluated |
| Isotope evidence | Element-specific nuclear context | Half-life and decay properties are isotope-specific; the page does not generalize one isotope to all atoms. | Evaluated |
| Teaching nucleus | ²⁷²Bh · 107 protons + 165 neutrons | Reference isotope used in the nucleus model | Reviewed |
| Property | Value | Context / provenance | Evidence |
|---|---|---|---|
| Ground-state electron configuration | [Rn] 5f¹⁴ 6d⁵ 7s² | Source-reviewed; see Sources below | Predicted |
| Group / period / block | Group 7 · Period 7 · d-block | Periodic-table placement | Evaluated |
| Electronegativity | Unknown | Source-reviewed; see Sources below | Unknown |
| Common oxidation states | +7 expected/observed in atom-scale chemistry | Source-reviewed; see Sources below | Predicted |
| Property | Value | Context / provenance | Evidence |
|---|---|---|---|
| ²⁷²Bh | Reference teaching isotope | Mass number belongs to a specific isotope and is not the same thing as relative atomic mass. | Evaluated |
| Isotope evidence | Element-specific nuclear context | Half-life and decay properties are isotope-specific; the page does not generalize one isotope to all atoms. | Evaluated |
| Teaching nucleus | ²⁷²Bh · 107 protons + 165 neutrons | Reference isotope used in the nucleus model | Reviewed |
| Property | Value | Context / provenance | Evidence |
|---|---|---|---|
| Current use | Scientific research only | No commercial bulk use is implied. | Reviewed |
| Geography | Discovery, naming and research context only | No natural-resource map is appropriate. | Reviewed |
| Safety boundary | Non-operational educational context | No synthesis settings or material-access guidance. | Reviewed |
| Property | Value | Context / provenance | Evidence |
|---|---|---|---|
| Density | Unknown | Source-reviewed; see Sources below | Unknown |
| Material / molecular structure | Bulk crystal structure unknown | No defensible macroscopic crystal lattice is displayed for Bohrium. Nuclear/atomic evidence and theory are kept separate from unmeasured bulk material properties. | Unknown |
| Melting / transition reference | Unknown | Source-reviewed; see Sources below | Unknown |
| Boiling / gas reference | Unknown | Source-reviewed; see Sources below | Unknown |
| Common oxidation states | +7 expected/observed in atom-scale chemistry | Source-reviewed; see Sources below | Predicted |
| Property | Value | Context / provenance | Evidence |
|---|---|---|---|
| Page evidence note | Atomic identity and source-reviewed reference values are separated from predictions. Search demand shapes headings and FAQs but never overrides scientific evidence; unknown bulk structure/density/phase values remain visibly unknown. | Evidence summary for this guide | Reviewed |
| Structure evidence | No defensible macroscopic crystal lattice is displayed for Bohrium. Nuclear/atomic evidence and theory are kept separate from unmeasured bulk material properties. | Measured structure, labelled schematic, prediction or explicit unknown as applicable. | Reviewed |
| Map evidence rule | Real pins are reviewed examples; conceptual layers are used when pins would mislead. | Geography Explorer 2.0 | Reviewed |
| Source set | 3 primary/reference links listed below | Open the Sources section for the actual references. | Reviewed |
Is Bohrium a solid, liquid or gas? State at temperature
No measured ordinary melting or boiling point is asserted. The phase track remains visible as an evidence-limited teaching view rather than inventing macroscopic transitions.
Where on Earth is Bohrium found or produced?
Who discovered Bohrium, and when?
A GSI team led by Peter Armbruster and Gottfried Münzenberg produced bohrium; it is named for Niels Bohr.
The element name and discovery story are part of the historical record; search-led questions are answered without turning history into scientific evidence for bulk properties.
Current use is described at the level supported by the element’s availability and evidence, with research-only elements kept research-only.
Research production context: high-level, non-operational
The element is produced or isolated only in specialized research/nuclear settings; this page intentionally omits operational synthesis, target, beam, separation, handling and access instructions.
Experimental identity is established from nuclear decay, spectroscopy and/or atom-scale chemistry appropriate to the element.
Any chemical or material inference is labelled by evidence strength; unmeasured bulk properties are not converted into visual facts.
Research use is described conceptually, with isotope-specific claims kept distinct from the element as a whole.
What is bohrium used for?
Scientific research only
Research-only context; no operational production or handling guidance.
Atom-scale transactinide chemistry and nuclear-decay studies
Research-only context; no operational production or handling guidance.
Bohrium isotopes and natural abundance
²⁷²Bh
Reference teaching isotopeMass number belongs to a specific isotope and is not the same thing as relative atomic mass.
Isotope evidence
Element-specific nuclear contextHalf-life and decay properties are isotope-specific; the page does not generalize one isotope to all atoms.
Five-question Bohrium check
What is Bohrium’s atomic number?
Which statement best describes the material evidence for Bohrium?
What is the safest rule for Bohrium uses?
Bohrium questions students commonly ask
Each answer starts with the direct fact, then explains the chemistry, evidence or material context so the result is understandable rather than merely memorized.
What is bohrium?
Short answer: Bohrium is chemical element 107, symbol Bh, classified here as transition metal · superheavy.
Atomic number 107 means every bohrium nucleus contains 107 protons. In the periodic table, Bohrium is classified here as a transition metal · superheavy in Period 7 and Group 7. Bohrium is element 107 in Period 7. Its d-block/series position provides useful periodic context, but element-specific experimental evidence takes priority over simple trend extrapolation.
Key point: Bh is element 107; its periodic position and electron structure explain the rest of the page.
What is the atomic number of bohrium?
Short answer: The atomic number is 107, meaning every bohrium nucleus has 107 protons.
Atomic number is defined by proton count, so 107 protons are what make an atom bohrium. A neutral bohrium atom also has 107 electrons, while isotopes can have different neutron counts without changing the element.
Key point: Atomic number = proton count.
What is the symbol for bohrium?
Short answer: The chemical symbol is Bh.
The symbol Bh is the standardized chemical abbreviation for element 107. In a chemical formula, Bh identifies bohrium atoms; a compound containing Bh is not automatically the same material as elemental bohrium.
Key point: Bh always identifies element 107.
What is bohrium used for?
Short answer: Bohrium has no commercial use; it exists only for scientific research.
Scientific research only: Research-only context; no operational production or handling guidance. Atom-scale transactinide chemistry and nuclear-decay studies: Research-only context; no operational production or handling guidance. Bohrium has experimentally observed nuclear identity and some atom-scale chemical evidence, but no measured bulk density, melting point or crystal lattice. Group-7 expectations are not a license to invent a material.
Key point: Always distinguish the pure element from the compound, alloy, isotope or device material that actually performs the application.
Who discovered bohrium?
Short answer: A team at GSI in Darmstadt produced convincing evidence for element 107 in 1981.
In 1981, A GSI team led by Peter Armbruster and Gottfried Münzenberg produced bohrium; it is named for Niels Bohr. The element name and discovery story are part of the historical record; search-led questions are answered without turning history into scientific evidence for bulk properties.
Key point: Discovery credit follows the historical evidence and accepted attribution, not just the earliest claim.
What does bohrium look like?
Short answer: No macroscopic sample has been observed. Calling it a shiny bulk metal would go beyond the evidence, so the Structure viewer remains evidence-only.
The ordinary elemental-material description used here is: Superheavy radioactive element observed atom by atom. No defensible macroscopic crystal lattice is displayed for Bohrium. Nuclear/atomic evidence and theory are kept separate from unmeasured bulk material properties.
Key point: Elemental appearance can differ from the colors of its ions, compounds, oxide films or host materials.
Scientific sources for Bohrium
- Royal Society of Chemistry - Bohrium
- NIST - Atomic Weights and Isotopic Compositions
- IUPAC - Periodic Table of Elements
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