1 For a 2-hour party, Cork Catering in Illinois charges $7.50 per guest for beer or wine only and $14.50 per guest for a premium bar serving most types of mixed drinks. 2  For detailed open bar pricing, see How Much Does an Open Bar Cost. For a 2-hour party, Cork Catering in Illinois charges $7.50 per guest for beer or wine only and $14.50 per guest for a premium bar serving most types of mixed drinks. 2  For detailed open bar pricing, see How Much Does an Open Bar Cost.
Selenium exists in a number of allotropic forms. Allotropes are forms of an element with different physical and chemical properties. One allotrope of selenium is an amorphous red powder. A lump of clay is an example of an amorphous material. A second allotrope of selenium has a bluish, metallic appearance.
The selenium dioxide is dissolved in acidic water to make selenous acid, which is reacted with sulfur dioxide to make selenium as an element. It is the red form that is made. To make the black form, the red form is heated and melted.ydrogen selenide is the acid made from selenide ion. Selenium also reacts with reactive metals to make selenides, such as sodium selenide or aluminium selenide. The +1 state is found in some selenium compounds, such as selenium(I) chloride.