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Copernicium is a chemical element on the periodic table with the atomic symbol Cn, atomic number 112, and standard atomic weight 285 u. Classified as a Transition Metal within Group 12 and Period 7 (d-block), copernicium possesses a ground-state electron configuration of [Rn] 5f¹⁴ 6d¹⁰ 7s² distributed across 7 concentric Bohr electron shells (2 · 8 · 18 · 32 · 32 · 18 · 2) with 2 outer-shell electrons. Named after Nicolaus Copernicus. Relativistic contraction of the closed 7s² shell makes Copernicium so volatile that single-atom gold-adsorption experiments show it behaves almost like a volatile noble-gas-like liquid/gas at room temperature.

⚛️ Interactive Periodic Table Lab: Explore Copernicium (Cn, Z = 112) in the CRV Science Dynamic Periodic Table & Bohr Orbital Lab to visualize its animated 2 · 8 · 18 · 32 · 32 · 18 · 2 electron shells, simulate live phase transitions from 0 K to 6,000 K, and compare periodic heatmaps across all 118 IUPAC elements.

Electron Shell Architecture and Ground-State Configuration

A neutral atom of copernicium contains 112 protons in its atomic nucleus balanced by 112 electrons occupying quantized atomic orbitals. In the Bohr-Sommerfeld and quantum-mechanical orbital models, these electrons populate 7 principal energy shells (K (n=1): 2e⁻, L (n=2): 8e⁻, M (n=3): 18e⁻, N (n=4): 32e⁻, O (n=5): 32e⁻, P (n=6): 18e⁻, Q (n=7): 2e⁻), terminating in the four-lobed d-orbital manifold (azimuthal quantum number l = 2) with ground-state configuration [Rn] 5f¹⁴ 6d¹⁰ 7s². Removing the most loosely bound valence electron from an isolated gaseous copernicium atom requires a first ionization energy of 1,155 kJ/mol, while its tendency to attract shared bonding electrons is quantified by a Pauling electronegativity of N/A (closed-shell or superheavy regime).

Periodic Table Position and Neighboring Elements

Within the periodic table, Copernicium occupies Period 7, Group 12 of the d-block (Transition Metals). Along Period 7, it is flanked by Roentgenium (Rg, Z = 111) and Nihonium (Nh, Z = 113). Vertically within its periodic family, Copernicium shares valence orbital symmetry and homologous chemical trends with Zinc (Zn), Cadmium (Cd), Mercury (Hg). Learners can interactively compare Copernicium's orbital radii, ionization energy, and Pauling electronegativity against all neighboring elements in the Dynamic Periodic Table Lab.

Standard Phase, Melting Point, and Boiling Point Dynamics

At standard ambient temperature and pressure (298.15 K / 25 °C, 1 atm), elemental copernicium exists as a dense liquid. As thermal energy increases, its crystal or molecular lattice undergoes solid-to-liquid fusion at a melting point of 283 K (+9.85 °C / +49.7 °F) and transitions to the vapor phase at a normal boiling point of 340 K (+66.85 °C / +152.3 °F), spanning a liquid thermodynamic range of 57 K. In the CRV Science Dynamic Periodic Table, dragging the live temperature slider between absolute zero (0 K) and solar-photosphere temperatures (6,000 K) dynamically tracks Copernicium's state transitions in real time alongside enthalpy and entropy phase equilibria.

Quantitative Atomic and Thermodynamic Parameter Matrix

Characteristic Oxidation States and Coordination Chemistry

As a d-block transition metal, partially filled (n−1)d orbitals lie close in energy to the outermost ns subshell, enabling variable oxidation states, d–d electronic transitions, coordination complex formation, and heterogeneous or metalloenzymatic redox catalysis. In chemical compounds, copernicium exhibits characteristic oxidation states of +2, +4. Depending on the electronegativity difference (Δχ) of its bonding partners—such as Oxygen (χ = 3.44), Fluorine (χ = 3.98), Chlorine (χ = 3.16), Nitrogen (χ = 3.04), Carbon (χ = 2.55), or Hydrogen (χ = 2.20)—copernicium forms redox-specific oxides, halides, hydrides, or coordination complexes governed by Gibbs free energy (ΔG = ΔH − TΔS).

Nucleosynthesis, Discovery History, and Elemental Origins

First identified or isolated in 1996, Copernicium carries a distinct cosmological and geochemical signature. As a synthetic transuranic element (Z = 112), copernicium does not persist in primordial terrestrial minerals and is produced atom-by-atom in nuclear reactors or heavy-ion particle accelerators.

Biochemical Classification: Abiotic / Technological / Synthetic

In comparative biochemistry and systems physiology, Copernicium is classified as Abiotic / Technological / Synthetic. No known essential biological role; important in planetary geochemistry, astrophysics, materials science, or nuclear physics. Across terrestrial and marine ecosystems, its chemical speciation interacts with thermodynamics, enthalpy, entropy, chemistry.

Key Mechanistic Functions and Technological Uses

Named after Nicolaus Copernicus. Relativistic contraction of the closed 7s² shell makes Copernicium so volatile that single-atom gold-adsorption experiments show it behaves almost like a volatile noble-gas-like liquid/gas at room temperature. Researchers and students can further investigate Copernicium's functional role alongside all 118 elements by launching the Interactive Periodic Table & Element Detective Lab on CRV Science Learn.

What is the electron configuration and valence shell structure of Copernicium (Cn)?

Copernicium (atomic number Z = 112) has the ground-state electron configuration [Rn] 5f¹⁴ 6d¹⁰ 7s², distributing its 112 electrons across 7 shells as 2 · 8 · 18 · 32 · 32 · 18 · 2. Its outermost shell contains 2 electrons, placing Copernicium in Group 12, Period 7 (d-block) as a member of the Transition Metals. You can watch these 112 electrons orbit the nucleus in real time in the Dynamic Periodic Table Bohr Lab.

What phase of matter is Copernicium at room temperature, and when does it melt or boil?

At standard room temperature (298 K / 25 °C) and 1 atm pressure, Copernicium is a dense liquid. It melts at 283 K (+9.85 °C / +49.7 °F) and boils at 340 K (+66.85 °C / +152.3 °F). Using the 0–6,000 K temperature slider in the Interactive Periodic Table, you can observe Copernicium's exact solid, liquid, and gas transitions relative to all other elements.

How does Copernicium function in biochemistry, materials science, and technology?

Named after Nicolaus Copernicus. Relativistic contraction of the closed 7s² shell makes Copernicium so volatile that single-atom gold-adsorption experiments show it behaves almost like a volatile noble-gas-like liquid/gas at room temperature. In biological systems, it is categorized under Abiotic / Technological / Synthetic, with principal oxidation states of +2, +4 and a first ionization energy of 1,155 kJ/mol.