108
Hs
Transition metal

Hassium

Atomic number 108 · Period 7 · Block D

Hs · Hassium
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Understanding the element

Hassium (Hs) is chemical element 108. It belongs to the transition metals, and its reference state at room temperature is not firmly established. Those basic facts are a useful starting point for its chemistry and applications.

Where do we encounter it?

In practice, it turns up most often in scientific research.

scientific research
Standard atomic weightNo standard atomic weight

What its position in the table tells us

Hassium sits in period 7, group 8 and the D block. That location is useful because neighbouring elements often share trends in valence electrons, oxidation states and bonding behaviour.

Worth remembering
Hassium is synthetic, very short-lived and studied atom by atom in nuclear-physics laboratories

Scientific sources

Element identity
Atomic number108
Group8
Period7
BlockD
CategoryTransition metal
PhaseUnknown