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112 Cn Copernicium 285

Copernicium

TRANSITION METAL
Bohr Model: Electrons arranged in energy shells around the nucleus.

Copernicium is a chemical element with symbol Cn and atomic number 112. It is an extremely radioactive synthetic element that can only be created in a laboratory. The most stable known isotope, copernicium-285, has a half-life of approximately 29 seconds, but it is possible that this copernicium isotope may have a nuclear isomer with a longer half-life, 8.9 min.

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Quick Facts

Atomic Number 112
Period 7
Group 12
Phase Liquid
Appearance Unknown
About Transition Metals

Transition metals are elements with partially filled d-orbitals. They are hard, have high melting points, and often form colored compounds.

History

Discovered By Gesellschaft für Schwerionenforschung
Named By Unknown

Physical Properties

Atomic Mass 285
Density 14.0 g/L
Molar Heat N/A J/(mol·K)
Phase Transition (Melting & Boiling Points)

Copernicium boils at 3570 K. The melting point is currently unknown.

Atomic Properties

Electron Config *[Rn] 5f14 6d10 7s2
Electronegativity N/A
Electron Affinity N/A kJ/mol
Ionization Energy N/A kJ/mol
Orbital Filling Diagram
This diagram visualizes electron configuration according to the Aufbau principle and Hund's rule. Boxes represent orbitals (s, p, d, f), while arrows indicate electrons with spin up or down. Electrons fill lower energy levels first and occupy orbitals singly before pairing.

Photograph

Image of Copernicium Source: Wikipedia

External Resources

Wikipedia PubChem Royal Society of Chemistry Periodic Videos (YouTube)

Study Guide

Atomic Number

The number of protons in the nucleus, which defines the element.

Atomic Mass

The average mass of an atom, including protons and neutrons.

Electronegativity

A measure of how strongly an atom attracts electrons in a bond.

Ionization Energy

The energy required to remove an electron from an atom.

Electron Config

The arrangement of electrons in the atom's energy shells.