Hay,+Emily

Name: Arsenic Symbol: As

Atomic Number: 33 Atomic Mass: 74.9216 Period: 4 Group: 15 Block: p Boiling Point: 614°C - 1137°F Melting Point: 817°C - 1503°F Gravity/Density: Solid-5727 kg m-3 Orbital Notatio n: 3d10 4s2 4p3  Protons: 33 Electrons: 33 Neutrons: 42 Valence electrons: 5 <span style="display: block; font-family: Verdana,Geneva,sans-serif; text-align: center;">Classification: Metalloid, semi-metallic <span style="display: block; font-family: Verdana,Geneva,sans-serif; text-align: center;">Color: grey, metallic grey, <span style="display: block; font-family: Verdana,Geneva,sans-serif; text-align: center;">Cost: $320 per 100g <span style="display: block; font-family: Verdana,Geneva,sans-serif; text-align: center;">Uses: poison, essential for growth, healthy nervous system, insecticide, laser diodes, LEDs, and some ammunition <span style="display: block; font-family: Verdana,Geneva,sans-serif; text-align: center;">__Discovered__: it is not known who discovered it but many civilizations and people used it for a long time. However, it is credited to Albertus Magnus, German philosopher in 1250A.D., for getting Arsenic after heating soap with orpiment and saying it had a metal like nature. It occurs free in nature but can be found in <span style="background-color: rgba(255,255,255,0);">the minerals arsenopyrite, realgar and orpiment. <span style="display: block; font-family: Verdana,Geneva,sans-serif; text-align: center;">__Other Names__: Yellow Arsenic, Black Arsenic, Grey Arsenic <span style="display: block; font-family: Verdana,Geneva,sans-serif; text-align: center;"> <span style="display: block; font-family: Verdana,Geneva,sans-serif; text-align: center;">__Physical Properties__: Solid, Tasteless, Steel Grey, Very Brittle, Crystalline. <span style="display: block; font-family: Verdana,Geneva,sans-serif; text-align: center;"> <span style="display: block; font-family: Verdana,Geneva,sans-serif; text-align: center;">__Chemical Properties__: Poisonous, Tarnishes Quickly, Combines with other Elements <span style="display: block; font-family: Verdana,Geneva,sans-serif; text-align: center;"> <span style="display: block; font-family: Verdana,Geneva,sans-serif; text-align: center;">__Reactions__: <span style="background-color: rgba(255,255,255,0);">Arsenic reacts with fluorine, F <span style="background-color: rgba(255,255,255,0); vertical-align: baseline;">2 <span style="background-color: rgba(255,255,255,0);">, to form the gas pentafluoride arsenic(V) fluoride. <span style="display: block; font-family: Verdana,Geneva,sans-serif; text-align: center;"><span style="background-color: rgba(255,255,255,0);">Arsenic is stable in dry air, but the surface oxidizes slowly in moist air to give a bronze tarnish and finally a black covering to the element. <span style="display: block; font-family: Verdana,Geneva,sans-serif; text-align: center;"><span style="background-color: rgba(255,255,255,0);">When heated in air, arsenic ignites "arsenic trioxide" <span style="display: block; font-family: Verdana,Geneva,sans-serif; text-align: center;"> <span style="display: block; font-family: Verdana,Geneva,sans-serif; text-align: center;">__<span style="background-color: rgba(255,255,255,0);">Facts __<span style="background-color: rgba(255,255,255,0);">:Arsenic is one of the elements which has an alchemical symbol. <span style="display: block; font-family: Verdana,Geneva,sans-serif; text-align: center;"><span style="background-color: rgba(255,255,255,0);">It was usually the poison of choice until it became easy to detect. <span style="font-family: Verdana,Geneva,sans-serif;">Although it is now strongly linked with poison, arsenic was once used widely as a medicine. Dr Fowler’s Solution (potassium arsenate dissolved in water) was a popular cure-all tonic in Victorian times - even Charles Dickens used it.

<span style="display: block; font-family: Verdana,Geneva,sans-serif; text-align: center;"> <span style="display: block; font-family: Verdana,Geneva,sans-serif; text-align: center;"> __Reference__ <span style="display: block; font-family: Verdana,Geneva,sans-serif; text-align: center;">Web Elements; [] ; Mark Winter; 2012 <span style="display: block; font-family: Verdana,Geneva,sans-serif; text-align: center;">Pictures Of Elements; [] ; Theodore Gray; 2013 <span style="display: block; font-family: Verdana,Geneva,sans-serif; text-align: center;"> Chemicool; []; Chemicool; 2014 <span style="display: block; font-family: Verdana,Geneva,sans-serif; text-align: center;">Periodic Table; []; The Royal Society of Chemistry; 2014 <span style="display: block; font-family: Verdana,Geneva,sans-serif; text-align: center;">