Here's why:

* Atomic Number: Arsenic has an atomic number of 33, meaning it has 33 protons and 33 electrons.

* Electron Configuration: The electron configuration of Arsenic is 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p³.

* Valence Electrons: The valence electrons are the electrons in the outermost shell, which are involved in chemical bonding. In Arsenic's case, the outermost shell is the 4th shell, and it has 5 electrons (4s²4p³).

Therefore, you would draw 5 electron dots around the symbol "As" to represent its valence electrons.