Arsenic is what? For many people this is a strange object, and here's the introduction:
Arsenic, commonly known As arsenic, which is a kinds of metal elements, in the chemical elements in the periodic table is located in the fourth period, the first VA, atomic number 33, As element symbols, simple substance arsenic arsenic arsenic in grey, black and yellow the three allotropes form. Arsenic is widely found in nature, with hundreds of arsenic minerals found. Arsenic and its compounds are used in pesticides, herbicides, pesticides, and many kinds of alloys. Its compound, arsenic trioxide, is known as arsenic and is a highly toxic substance.
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