The element arsenic has an electron count of 33. The element was originally discovered by Albertus Magnus, and it is considered a semimetallic element. At a temperature of 20 degrees Celsius, arsenic stays in a solid state and has a bright, silver-gray metallic form.
In small doses, arsenic is poisonous to humans and acts as a carcinogen. A form of arsenic is found in prawns in high concentrations. In this form, arsenic's poisonous effects are less harmful to humans. Arsenic is also created as a byproduct of both the copper and lead refining processes. Individuals with arsenic poisoning typically have traces of it bound to their hair atoms.