Arsenic-+Poison+of+choice+for+many+murders


 * Symbol || As ||
 * Element category || Metalloid ||
 * Group, Period || 15,4 ||
 * Electronic Configuration || 2,8,18,5 ||


 * Atomic number || 33 ||
 * Relative Atomic mass || 74.92 ||

__//**Basic facts**//__

 * **Color**is tin-white which quickly tarnishes to dark gray or black.
 * **Hardness**is 3 - 4
 * **Specific Gravity**is 5.4 - 5.9+ (somewhat heavy for a metallic mineral)
 * **Streak**is black.
 * **Other Characteristics:**Will often have a garlic odor and is poisonous.
 * **Notable Natural Occurrences**include Vosges, France; Kongsberg, Norway; Saxony and Harz Mountains, Germany; Honshu, Japan; England; Italy and Santa Cruz Co., Arizona and New Jersey, USA.
 * **Best Field Indicators**are tarnish, density, softness, crystal habits, color, garlic smell and associations.

== A few species of bacteria are able to use arsenic compounds as respiratory metabolites, and are arsenic-tolerant. However, arsenic is notoriously poisonous to multicellular life, due to the interaction of arsenic ions with protein thiols. ==

__//** Isotopes **//__
Naturally occurring arsenic is composed of one stable isotope. 33 radioisotopes have also been made, ranging in Atomic mass from 60 to 92.

__**Real life applications **__  -Wood preservative due to toxicity to insects, bacteria and fungi. - Used in various Agricultural Insecticides -Added to animal food to prevent disease, and as a method of growth stimulation. -Making alloys with copper and lead -Used as chemical weapons
 * The effects of Arsenic poisoning shown above**