Element 109 · Meitnerium (Mt)

Meitnerium Bohr model: diagram and electrons per shell

The meitnerium Bohr model shows a meitnerium atom (Mt) 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, 15 in shell P and 2 in shell Q. This page has a rotating 3D meitnerium Bohr model, a flat diagram, a table of the electrons in each shell and the steps to draw it yourself.

Rotate the meitnerium Bohr model in 3D

Drag to orbit, scroll to zoom.

This is a Bohr model of meitnerium (Mt), a simplified picture of a single meitnerium atom. Its nucleus holds 109 protons, and a neutral meitnerium atom has 109 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, 15 in shell P and 2 in shell Q).

Mt K · 21s² L · 82s² 2p⁶ M · 183s² 3p⁶ 3d¹⁰ N · 324s² 4p⁶ 4d¹⁰ 4f¹⁴ O · 325s² 5p⁶ 5d¹⁰ 5f¹⁴ P · 156s² 6p⁶ 6d⁷ Q · 27s²

Meitnerium Bohr model diagram

Bohr model diagram of meitnerium: a nucleus of 109 protons with 109 electrons on 7 shells, 2 in shell K, 8 in shell L, 18 in shell M, 32 in shell N, 32 in shell O, 15 in shell P and 2 in shell Q, each ring labelled with its shell letter. — The meitnerium 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, 15 in shell P and 2 in shell Q).

Meitnerium electrons per shell

A neutral meitnerium atom has 109 electrons, one for each of its 109 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, 15 in shell P and 2 in shell Q.

Electrons in each shell of the meitnerium 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	15	72	6s² 6p⁶ 6d⁷
Q	7	2	98	7s²

How the meitnerium Bohr model builds up, shell by shell

Watch the meitnerium 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, 15 in shell P and 2 in shell Q) as it forms.

Animation of the meitnerium Bohr model being built: a nucleus of 109 protons appears first, then each shell grows in around it and takes its electrons, giving 109 electrons on 7 shells (2 in shell K, 8 in shell L, 18 in shell M, 32 in shell N, 32 in shell O, 15 in shell P and 2 in shell Q). — The meitnerium 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, 15 in shell P and 2 in shell Q. Protons are red, neutrons yellow and electrons blue.

How to draw the meitnerium Bohr model

Find the atomic number. Meitnerium has atomic number 109, so a neutral atom has 109 protons and 109 electrons.
Draw the nucleus. Put a circle in the centre and write Mt in it. The 109 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, 15 in shell P and 2 in shell Q.
Check the total. 2 + 8 + 18 + 32 + 32 + 15 + 2 = 109, the atomic number, so every electron is accounted for.

Atomic data for the meitnerium Bohr model

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

Identity

Symbol: Mt
Atomic number: 109
Atomic mass: [278] u
Family: Transition Metals
Position: group 9, 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 6d⁷
Shorthand: *[Rn] 5f¹⁴ 6d⁷ 7s²
Electrons per shell: 2, 8, 18, 32, 32, 15, 2
Outer-shell electrons: 2 in shell Q

Physical properties, abundance and history of meitnerium

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

Physical properties

Density: 37.4 g/cm³

Discovery

Discovered by: Gesellschaft für Schwerionenforschung
Year: 1982

Common compounds

Meitnerium Mt
Meitnerium cyanide CMtN-
Ethane;meitnerium C2H5Mt-
(2,5-Dioxopyrrolidin-1-yl) 2-[2-(methanidylamino)ethyldisulfanyl]ethyl carbonate;meitnerium C10H15MtN2O5S2-
Meitnerium;3-methylsulfonylpropane-1-sulfonic acid C4H10MtO5S2
2-Acetamidoethanesulfonic acid;meitnerium C4H9MtNO4S
2-Hydroxy-3-(3-methylsulfonylpropylsulfonylamino)propane-1-sulfonic acid;meitnerium C7H17MtNO8S3
Meitnerium;3-methyl-1,1-dioxothiolane-3-sulfonic acid C5H10MtO5S2

Compounds listed in the PubChem database.

Main isotopes of meitnerium

Isotopes of meitnerium share the same 109 protons but differ in neutrons. Natural isotopes come first, then the longest-lived others.

Main isotopes of meitnerium: mass number, abundance, half-life and decay
Mass number	Natural abundance	Half-life	Decay
270	–	800 ms	α
274	–	850 ms	α
275	–	31 ms	α
276	–	700 ms	α
277	–	9 s	SF, α
278	–	6 s	α

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

More about meitnerium

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