Element 108 · Hassium (Hs)

Hassium Bohr model: diagram and electrons per shell

The hassium Bohr model shows a hassium atom (Hs) 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, 14 in shell P and 2 in shell Q. This page has a rotating 3D hassium Bohr model, a flat diagram, a table of the electrons in each shell and the steps to draw it yourself.

Rotate the hassium Bohr model in 3D

Drag to orbit, scroll to zoom.

This is a Bohr model of hassium (Hs), a simplified picture of a single hassium atom. Its nucleus holds 108 protons, and a neutral hassium atom has 108 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, 14 in shell P and 2 in shell Q).

Hs K · 21s² L · 82s² 2p⁶ M · 183s² 3p⁶ 3d¹⁰ N · 324s² 4p⁶ 4d¹⁰ 4f¹⁴ O · 325s² 5p⁶ 5d¹⁰ 5f¹⁴ P · 146s² 6p⁶ 6d⁶ Q · 27s²

Hassium Bohr model diagram

Bohr model diagram of hassium: a nucleus of 108 protons with 108 electrons on 7 shells, 2 in shell K, 8 in shell L, 18 in shell M, 32 in shell N, 32 in shell O, 14 in shell P and 2 in shell Q, each ring labelled with its shell letter. — The hassium 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, 14 in shell P and 2 in shell Q).

Hassium electrons per shell

A neutral hassium atom has 108 electrons, one for each of its 108 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, 14 in shell P and 2 in shell Q.

Electrons in each shell of the hassium 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	14	72	6s² 6p⁶ 6d⁶
Q	7	2	98	7s²

How the hassium Bohr model builds up, shell by shell

Watch the hassium 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, 14 in shell P and 2 in shell Q) as it forms.

Animation of the hassium Bohr model being built: a nucleus of 108 protons appears first, then each shell grows in around it and takes its electrons, giving 108 electrons on 7 shells (2 in shell K, 8 in shell L, 18 in shell M, 32 in shell N, 32 in shell O, 14 in shell P and 2 in shell Q). — The hassium 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, 14 in shell P and 2 in shell Q. Protons are red, neutrons yellow and electrons blue.

How to draw the hassium Bohr model

Find the atomic number. Hassium has atomic number 108, so a neutral atom has 108 protons and 108 electrons.
Draw the nucleus. Put a circle in the centre and write Hs in it. The 108 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, 14 in shell P and 2 in shell Q.
Check the total. 2 + 8 + 18 + 32 + 32 + 14 + 2 = 108, the atomic number, so every electron is accounted for.

Atomic data for the hassium Bohr model

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

Identity

Symbol: Hs
Atomic number: 108
Atomic mass: [269] u
Family: Transition Metals
Position: group 8, 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 6d⁶
Shorthand: *[Rn] 5f¹⁴ 6d⁶ 7s²
Electrons per shell: 2, 8, 18, 32, 32, 14, 2
Outer-shell electrons: 2 in shell Q

Physical properties, abundance and history of hassium

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

Physical properties

Density: 40.7 g/cm³

Discovery

Discovered by: Gesellschaft für Schwerionenforschung
Year: 1984

Common compounds

Hassium Hs
6-(2-chloro-6-fluorophenyl)-4-N-(6-chloro-3-pyridinyl)-2-N-[(E)-1-[4-(trifluoromethoxy)phenyl]propylideneamino]pyrimidine-2,4-diamine;hassium C25H17Cl2F4HsN6O-
1-cyclohexyloxycarbonyloxyethyl 3-[[4-[2-(2,5-dihydro-1H-tetrazol-5-yl)phenyl]phenyl]methyl]-2-ethynoxybenzimidazole-4-carboxylate;hassium C33H31HsN6O6-
Carbanide;hassium;vanadium CH3HsV-
[2,2-bis(hydroxymethyl)-3-methoxypropyl] (2R,4R)-2-(2-hydroxyphenyl)-3-propanoyl-1,3-thiazolidine-4-carboxylate;hassium C19H26HsNO7S-
N-[(2,6-dimethoxyphenyl)iminomethyl]methanesulfonamide;hassium C10H13HsN2O4S-
Hassium;3,6,7-trimethyl-2,4-dihydrofuro[3,2-d]pyrimidin-2-id-4-amine C9H12HsN3O-
CID 146902523 C3H3HsN2S2-

Compounds listed in the PubChem database.

Main isotopes of hassium

Isotopes of hassium share the same 108 protons but differ in neutrons. Natural isotopes come first, then the longest-lived others.

Main isotopes of hassium: mass number, abundance, half-life and decay
Mass number	Natural abundance	Half-life	Decay
264	–	0.7 s	α, SF
268	–	1.4 s	α
269	–	15 s	α
270	–	9 s	α, SF
273	–	1060 ms	α, SF
275	–	280 ms	α

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

More about hassium

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