Element 111 · Roentgenium (Rg)

Roentgenium Bohr model: diagram and electrons per shell

The roentgenium Bohr model shows a roentgenium atom (Rg) 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, 17 in shell P and 2 in shell Q. This page has a rotating 3D roentgenium Bohr model, a flat diagram, a table of the electrons in each shell and the steps to draw it yourself.

Rotate the roentgenium Bohr model in 3D

Drag to orbit, scroll to zoom.

This is a Bohr model of roentgenium (Rg), a simplified picture of a single roentgenium atom. Its nucleus holds 111 protons, and a neutral roentgenium atom has 111 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, 17 in shell P and 2 in shell Q).

Rg K · 21s² L · 82s² 2p⁶ M · 183s² 3p⁶ 3d¹⁰ N · 324s² 4p⁶ 4d¹⁰ 4f¹⁴ O · 325s² 5p⁶ 5d¹⁰ 5f¹⁴ P · 176s² 6p⁶ 6d⁹ Q · 27s²

Roentgenium Bohr model diagram

Bohr model diagram of roentgenium: a nucleus of 111 protons with 111 electrons on 7 shells, 2 in shell K, 8 in shell L, 18 in shell M, 32 in shell N, 32 in shell O, 17 in shell P and 2 in shell Q, each ring labelled with its shell letter. — The roentgenium 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, 17 in shell P and 2 in shell Q).

Roentgenium electrons per shell

A neutral roentgenium atom has 111 electrons, one for each of its 111 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, 17 in shell P and 2 in shell Q.

Electrons in each shell of the roentgenium 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	17	72	6s² 6p⁶ 6d⁹
Q	7	2	98	7s²

How the roentgenium Bohr model builds up, shell by shell

Watch the roentgenium 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, 17 in shell P and 2 in shell Q) as it forms.

Animation of the roentgenium Bohr model being built: a nucleus of 111 protons appears first, then each shell grows in around it and takes its electrons, giving 111 electrons on 7 shells (2 in shell K, 8 in shell L, 18 in shell M, 32 in shell N, 32 in shell O, 17 in shell P and 2 in shell Q). — The roentgenium 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, 17 in shell P and 2 in shell Q. Protons are red, neutrons yellow and electrons blue.

How to draw the roentgenium Bohr model

Find the atomic number. Roentgenium has atomic number 111, so a neutral atom has 111 protons and 111 electrons.
Draw the nucleus. Put a circle in the centre and write Rg in it. The 111 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, 17 in shell P and 2 in shell Q.
Check the total. 2 + 8 + 18 + 32 + 32 + 17 + 2 = 111, the atomic number, so every electron is accounted for.

Atomic data for the roentgenium Bohr model

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

Identity

Symbol: Rg
Atomic number: 111
Atomic mass: [282] u
Family: Transition Metals
Position: group 11, 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 6d⁹
Shorthand: *[Rn] 5f¹⁴ 6d¹⁰ 7s¹
Electrons per shell: 2, 8, 18, 32, 32, 17, 2
Outer-shell electrons: 2 in shell Q

Electronegativity and electron affinity

Electron affinity (kJ/mol): 151

Physical properties, abundance and history of roentgenium

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

Physical properties

Density: 28.7 g/cm³

Discovery

Discovered by: Gesellschaft für Schwerionenforschung
Year: 1994

Common compounds

Roentgenium Rg
CID 160988354 C9H11NO2Rg

Compounds listed in the PubChem database.

Main isotopes of roentgenium

Isotopes of roentgenium share the same 111 protons but differ in neutrons. Natural isotopes come first, then the longest-lived others.

Main isotopes of roentgenium: mass number, abundance, half-life and decay
Mass number	Natural abundance	Half-life	Decay
274	–	20 ms	α
278	–	8 ms	α
279	–	170 ms	α
280	–	4.3 s	α
281	–	19 s	SF, α
282	–	130 s	α

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

More about roentgenium

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