Arsenic is a toxic metalloid whose compounds occur naturally in minerals and can contaminate groundwater.
Atomic number
33
Category
Metalloid
Period
4
Group
15
State
Solid
Fun facts about Arsenic
Arsenic has several allotropes, including grey and yellow forms.
Gallium arsenide is a valuable compound semiconductor.
Chronic exposure to inorganic arsenic can cause serious illness.
Common uses of Arsenic
Compound semiconductors
Speciality alloys
Historical pesticides and wood preservatives
Where Arsenic sits in the periodic table
Arsenic is classified as a metalloid in period 4 and group 15 of the periodic table. Under the conditions represented in this reference, its state is solid.
Quick chemistry revision
For quick revision, pair the symbol As with atomic number 33 and the listed atomic mass 74.922. The summary, facts, and uses above keep those element properties together in one reference.