Element Arsenic.

Arsenic
Number of Electrons, Protons, Neutrons, Symbol and Name
Name: Arsenic
Symbol: As
Number of Protons: 33
Number of Electrons: 33
Number of Neutrons: 42
Melting Point: 817.0 °C (1090.15 °K, 1502.6 °F)
Boiling Point: 613.0 °C (886.15 °K, 1135.4 °F)
History
Arsenic: From the Latin word arsenicum, the Greek word arsenikon and the Arabic word Az-zernikh. Arsenic is pronounced AR-s'n-ik. Although the early Chinese, Greek mined arsenic compounds and Egyptian civilizations, it is believed that Albertus Magnus, a German alchemist, first identified arsenic itself.…