Misc: What is the element symbol for Selenium (gray)?

Questions

By the time a child finishes elementary school they will have witnessed how many acts of violence on television?

By what chemical process do plants manufacture food?

By what country was the first concentration camp setup during the Boer wars?

By what other name do we know table tennis?

Caciocavallo, herkimer, mysost, & trappist are all varieties of what?