Question

At least how many known allotropes do selenium have?

• A. 4
• B. 5
• C. 6
• D. 2

Answer 1

The correct option is B 5

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. Amorphous means "without crystalline shape." A lump of clay is an example of an amorphous material. A second allotrope of selenium has a bluish, metallic appearance. A number of other allotropes have properties somewhere between these two forms.