Written by the Fiveable Content Team • Last updated September 2025
Written by the Fiveable Content Team • Last updated September 2025
Definition
Bismuth is a post-transition metal with the atomic number 83 and symbol Bi. It is known for its low toxicity and unique properties such as high density and low thermal conductivity.
5 Must Know Facts For Your Next Test
Bismuth has an atomic number of 83, placing it in group 15 of the periodic table.
It has a relatively low melting point of 271.5°C (520.7°F) compared to other metals.
Bismuth is diamagnetic, meaning it is repelled by magnetic fields.
It expands upon solidification, one of the few materials to do so along with water.
Bismuth compounds are often used in pharmaceuticals, cosmetics, and pigments due to their non-toxic nature.
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Related terms
Post-transition Metals: Elements found in groups 13-16 on the periodic table that have metallic properties but are softer and have lower melting points than transition metals.
Diamagnetism: A form of magnetism where certain materials are repelled by a magnetic field.
Periodicity: The repeating pattern of chemical and physical properties of elements as arranged by increasing atomic number on the periodic table.