Hassium (Hs)
Calculations predict that solid hassium would be denser than osmium, the densest element known in bulk.
Hassium properties
- Atomic number
- 108
- Atomic mass
- 277 u
- Category
- Transition metal
- Group
- 8
- Period
- 7
- Block
- d-block
- State at room temp.
- Unknown
- Density
- —
- Common charges
- +2, +3, +4, +5, +6, +8
- Oxidation states
- +8, +6, +5, +4, +3, +2
- Electron affinity
- —
- Radioactive
- Yes, no stable isotopes
- Discovered
- 1984
Hassium electron configuration
- Electron configuration
- [Rn] 5f14 6d6 7s2
- Full electron configuration
- 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d10 5f14 6s2 6p6 6d6 7s2
- Electron shells
- 2 · 8 · 18 · 32 · 32 · 14 · 2
The electron configuration of Hassium (Hs) is [Rn] 5f14 6d6 7s2. Its 108 electrons are arranged in shells as 2, 8, 18, 32, 32, 14, 2.
Protons, neutrons and electrons in Hassium
A neutral Hassium atom has 108 protons and 108 electrons. Most Hassium atoms have about 169 neutrons: the atomic mass rounded to 277, minus the atomic number 108.
Neutrons are approximate: atoms of the same element can have different numbers of neutrons (isotopes). Atomic number and mass
How many valence electrons does Hassium have?
2
Hassium has 2 valence electrons, counting the electrons in its outermost s subshell. Like most transition metals, it can also use d electrons in bonding.
Hassium orbital diagram
Each box is an orbital that holds up to two electrons with opposite spins (↑↓). The inner shells are the same as the noble gas in brackets. How to write electron configurations
Molar mass of Hassium
277 g/mol
One mole of Hassium atoms (6.022 × 10²³ atoms) has a mass of 277 grams. Use this value to convert between grams and moles.
Hassium facts
- Calculations predict that solid hassium would be denser than osmium, the densest element known in bulk.
- Hassium-270, with 108 protons and 162 neutrons, is considered a 'doubly magic' deformed nucleus, unusually stable for its size.
- Hassium (Hs) has atomic number 108. It was discovered in 1984.
Position in the periodic table
Hassium is element 108, in period 7 and group 8 of the periodic table, in the d-block.
Uses of Hassium
Hassium has no uses outside research, since only a few atoms are made at a time. In 2001 scientists at GSI turned a handful of hassium atoms into hassium tetroxide, a volatile compound. This showed that hassium behaves like osmium, the element above it in group 8, which also forms a volatile tetroxide.
Who discovered Hassium?
Peter Armbruster and Gottfried Münzenberg's team at GSI in Darmstadt, Germany, made hassium in 1984 by bombarding lead with iron ions. It is named after the German state of Hesse, whose Latin name is Hassia.
Where does the name come from?
Hassium comes from Hassia, the Latin name for the German state of Hesse. The element was first made in 1984 at the GSI heavy-ion research center in Darmstadt, which lies in Hesse.
Same group
Compare Hassium
FAQ
What is the electron configuration of Hassium?
The electron configuration of Hassium (Hs) is [Rn] 5f14 6d6 7s2. Its 108 electrons are arranged in shells as 2, 8, 18, 32, 32, 14, 2.
How many protons, neutrons and electrons does Hassium have?
A neutral Hassium atom has 108 protons and 108 electrons. Most Hassium atoms have about 169 neutrons: the atomic mass rounded to 277, minus the atomic number 108.
How many valence electrons does Hassium have?
Hassium has 2 valence electrons, counting the electrons in its outermost s subshell. Like most transition metals, it can also use d electrons in bonding.
What is the molar mass of Hassium?
The molar mass of Hassium is 277 g/mol. This is the same number as its atomic mass, 277 u.
Is Hassium a metal?
Yes. Hassium is a transition metal, so it is a metal.
Is Hassium radioactive?
Yes. Hassium has no stable isotopes, so all of its atoms are radioactive and eventually decay into other elements.
Where is Hassium on the periodic table?
Hassium is element 108, in period 7 and group 8 of the periodic table, in the d-block.