Arsenic is a chemical element with symbol As and atomic number 33. Arsenic occurs in many minerals, usually in conjunction with sulfur and metals, and also as a pure elemental crystal. Arsenic is a metalloid. It can exist in various allotropes, although only the gray form has important use in industry.ray arsenic (Î±-As, space group R 3 m No. 166) adopts a double-layered structure consisting of many interlocked, ruffled, six-membered rings. Because of weak bonding between the layers, gray arsenic is brittle and has a relatively low Mohs hardness of 3.5.
Consumers' cooperative is ought to provide quality goods and services at the lowest cost to the consumer/owners alike.producer cooperatives help in creation of jobs hence help alleviate poverty. 5 people found this useful.
A purchasing cooperative is a type of cooperative arrangement, often among businesses, to agree to aggregate demand to get lower prices from selected suppliers. Retailers' cooperatives are a form of purchasing cooperative. It is often used by government agencies to reduce costs of procurement. Purchasing Cooperatives are used most frequently by governmental entities, since they are required to follow laws requiring competitive bidding above certain thresholds.