Element 112 · Copernicium (Cn)

Copernicium Bohr model: diagram and electrons per shell

The copernicium Bohr model shows a copernicium atom (Cn) as a small nucleus with its electrons circling it in 7 shells: 2 in shell K, 8 in shell L, 18 in shell M, 32 in shell N, 32 in shell O, 18 in shell P and 2 in shell Q. This page has a rotating 3D copernicium Bohr model, a flat diagram, a table of the electrons in each shell and the steps to draw it yourself.

Rotate the copernicium Bohr model in 3D

Drag to orbit, scroll to zoom.

This is a Bohr model of copernicium (Cn), a simplified picture of a single copernicium atom. Its nucleus holds 112 protons, and a neutral copernicium atom has 112 electrons, arranged around it in 7 shells (2 in shell K, 8 in shell L, 18 in shell M, 32 in shell N, 32 in shell O, 18 in shell P and 2 in shell Q).

Cn K · 21s² L · 82s² 2p⁶ M · 183s² 3p⁶ 3d¹⁰ N · 324s² 4p⁶ 4d¹⁰ 4f¹⁴ O · 325s² 5p⁶ 5d¹⁰ 5f¹⁴ P · 186s² 6p⁶ 6d¹⁰ Q · 27s²

Copernicium Bohr model diagram

Bohr model diagram of copernicium: a nucleus of 112 protons with 112 electrons on 7 shells, 2 in shell K, 8 in shell L, 18 in shell M, 32 in shell N, 32 in shell O, 18 in shell P and 2 in shell Q, each ring labelled with its shell letter. — The copernicium Bohr model drawn flat: each ring is a shell, labelled with its letter, and every dot is an electron (2 in shell K, 8 in shell L, 18 in shell M, 32 in shell N, 32 in shell O, 18 in shell P and 2 in shell Q).

Copernicium electrons per shell

A neutral copernicium atom has 112 electrons, one for each of its 112 protons. They fill the shells from the nucleus outwards: 2 in shell K, 8 in shell L, 18 in shell M, 32 in shell N, 32 in shell O, 18 in shell P and 2 in shell Q.

Electrons in each shell of the copernicium Bohr model
Shell	Shell number (n)	Electrons	Most it can hold (2n²)	Subshells
K	1	2	2	1s²
L	2	8	8	2s² 2p⁶
M	3	18	18	3s² 3p⁶ 3d¹⁰
N	4	32	32	4s² 4p⁶ 4d¹⁰ 4f¹⁴
O	5	32	50	5s² 5p⁶ 5d¹⁰ 5f¹⁴
P	6	18	72	6s² 6p⁶ 6d¹⁰
Q	7	2	98	7s²

How the copernicium Bohr model builds up, shell by shell

Watch the copernicium Bohr model come together: the nucleus first, then each shell in turn, from the innermost outwards, with its electrons joining the ring. The legend names every shell and counts its electrons, so you can read off the arrangement (2 in shell K, 8 in shell L, 18 in shell M, 32 in shell N, 32 in shell O, 18 in shell P and 2 in shell Q) as it forms.

Animation of the copernicium Bohr model being built: a nucleus of 112 protons appears first, then each shell grows in around it and takes its electrons, giving 112 electrons on 7 shells (2 in shell K, 8 in shell L, 18 in shell M, 32 in shell N, 32 in shell O, 18 in shell P and 2 in shell Q). — The copernicium Bohr model built up in six seconds: the nucleus first, then each shell with its electrons, ending with 2 in shell K, 8 in shell L, 18 in shell M, 32 in shell N, 32 in shell O, 18 in shell P and 2 in shell Q. Protons are red, neutrons yellow and electrons blue.

How to draw the copernicium Bohr model

Find the atomic number. Copernicium has atomic number 112, so a neutral atom has 112 protons and 112 electrons.
Draw the nucleus. Put a circle in the centre and write Cn in it. The 112 protons sit there with the neutrons.
Draw the shells. Sketch 7 shells as rings around the nucleus. A shell holds at most 2n² electrons: 2 in the first, 8 in the second, 18 in the third and 32 in the fourth.
Place the electrons. Fill from the inside out: 2 in shell K, 8 in shell L, 18 in shell M, 32 in shell N, 32 in shell O, 18 in shell P and 2 in shell Q.
Check the total. 2 + 8 + 18 + 32 + 32 + 18 + 2 = 112, the atomic number, so every electron is accounted for.

Atomic data for the copernicium Bohr model

The numbers behind the copernicium Bohr model, grouped by topic. Radii are in picometres (pm) and energies in kilojoules per mole (kJ/mol).

Identity

Symbol: Cn
Atomic number: 112
Atomic mass: [285] u
Family: Transition Metals
Position: group 12, period 7
Block: d-block

Electron configuration

Full: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p⁶ 7s² 5f¹⁴ 6d¹⁰
Shorthand: *[Rn] 5f¹⁴ 6d¹⁰ 7s²
Electrons per shell: 2, 8, 18, 32, 32, 18, 2
Outer-shell electrons: 2 in shell Q

Physical properties, abundance and history of copernicium

Bulk properties of copernicium, how common it is, who discovered it and some of its compounds.

Physical properties

Melting point: 9.85°C (283 K)
Boiling point: 66.85°C (340 K)
Density: 14 g/cm³

Discovery

Discovered by: Gesellschaft für Schwerionenforschung
Year: 1996

Common compounds

Copernicium Cn

Compounds listed in the PubChem database.

Main isotopes of copernicium

Isotopes of copernicium share the same 112 protons but differ in neutrons. Natural isotopes come first, then the longest-lived others.

Main isotopes of copernicium: mass number, abundance, half-life and decay
Mass number	Natural abundance	Half-life	Decay
281	–	180 ms	α, SF
282	–	1.1 ms	SF, α
283	–	4.7 s	α, SF
284	–	102 ms	SF
285	–	30 s	α
286	–	30 s	α, SF

α = alpha decay, β⁻ = beta-minus, β⁺ = beta-plus, EC = electron capture, SF = spontaneous fission, p / n = proton / neutron emission.

More about copernicium

Copernicium on the periodic table – properties, isotopes, uses and the full copernicium page.
Transition Metals – all transition metal elements and their trends.
Bohr model of every element – the Bohr model of all 118 elements.