Worksheet: Metals and Nonmetals

An element has the electron configuration [Ar]4s23d104p4. Using the electron configuration and a periodic table answer the following questions. What is the element? Selenium. What group is it in? 16. What period is it in? 4. Is it a metal, nonmetal, or metalloid? nonmetal. List three properties of this substance? Dull, brittle, insulator. ................
................