The chemical symbol of arsenic is :

As

The correct answer is option 1. As.

Arsenic is a chemical element with the symbol "As" and atomic number 33. Here's an explanation of the chemical symbol: The symbol "As" is the abbreviated representation used to identify the element arsenic in the periodic table. Chemical symbols are short, standardized abbreviations for elements and are typically derived from the element's name in English or Latin. Arsenic is a metalloid, meaning it has properties of both metals and nonmetals. It is located in Group 15 (formerly known as Group V or Group 5A) of the periodic table. Arsenic is known for its various allotropes, including gray arsenic and yellow arsenic. Arsenic is found in nature, and its compounds have been used historically in various applications, including pesticides, wood preservatives, and medicines. While some forms of arsenic are toxic, others have industrial applications, such as in the production of semiconductors.

In summary, the chemical symbol "As" uniquely represents the element arsenic and is used in chemical formulas, equations, and the periodic table to denote this specific element.