Hassium (Hs): Electron Configuration and Properties
Hassium (Hs): Electron Configuration and Properties
Electron configuration [Rn] 7s2 5f14 6d6 · group 8 · period 7 · Ar [269]
Hassium data
- Atomic number
- 108
- Relative atomic mass
- [269]
- Group
- 8
- Period
- 7
- Block
- d
- Category
- Transition metal
- Electron configuration
- [Rn] 7s2 5f14 6d6
- Full configuration
- 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 7s2 5f14 6d6
- Electrons per shell
- 2, 8, 18, 32, 32, 14, 2 (K L M N O P Q)
- Valence electrons
- 8
- Electronegativity (Pauling)
- no data
- First ionisation energy
- no data
- Atomic radius (van der Waals)
- no data
- State at room temperature
- Solid
- Melting point
- no data
- Boiling point
- no data
- Density
- no data
- Common oxidation states
- +8, +6, +5, +4, +3, +2
- Discovered
- 1984
Source: PubChem (NIH, accessed 13 Nov 2026); atomic mass: IUPAC standard atomic weight.
Electron shell diagram
K 2 · L 8 · M 18 · N 32 · O 32 · P 14 · Q 2
Orbital diagram (outer electrons)
About hassium
Hassium is a chemical element with the symbol Hs and atomic number 108. It is a transition metal in group 8, period 7, d-block. Hassium was first discovered in 1984. It is named after the German state of Hesse. Its bulk properties have never been measured because only a few atoms have been made; it is expected to be a solid at room temperature.
Hassium electron configuration
The electron configuration of hassium is 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 7s2 5f14 6d6, or in short [Rn] 7s2 5f14 6d6. Its electrons occupy 7 shells: K = 2, L = 8, M = 18, N = 32, O = 32, P = 14, Q = 2. For transition metals, valence electrons are counted from the 7s and 6d subshells: 2 + 6 = 8, matching group 8. For this superheavy element the configuration is a theoretical prediction.
Filling order: 1s2(2) → 2s2(4) → 2p6(10) → 3s2(12) → 3p6(18) → 4s2(20) → 3d10(30) → 4p6(36) → 5s2(38) → 4d10(48) → 5p6(54) → 6s2(56) → 4f14(70) → 5d10(80) → 6p6(86) → 7s2(88) → 5f14(102) → 6d6(108)
Uses of hassium
Hassium has no practical use outside research, because it can only be made a few atoms at a time in particle accelerators.
Safety
Only a handful of hassium atoms have ever been made and they decay very quickly, so it is never handled in an ordinary laboratory.
Other elements in group 8
Frequently asked questions
What is the electron configuration of hassium?
The electron configuration of hassium (Hs, atomic number 108) is 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 7s2 5f14 6d6, or [Rn] 7s2 5f14 6d6 in short. By shell: 2, 8, 18, 32, 32, 14, 2.
How many valence electrons does hassium have?
Hassium has 8 valence electrons.
Which group and period is hassium in?
Hassium is in group 8, period 7, d-block.
What is the atomic mass of hassium?
Hassium has no stable isotope, so the mass number of its longest-lived isotope, [269], is given.
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