Atomic Structure and Radioactivity Week 1 Post #1

9/15: Today we took our pre-test for the Atomic Structure and Radioactivity unit. I knew hardly nothing on the pre-test, so it looks like this unit will be entirely new information for me. I recognized some terms like alpha-decay and beta-decay but I don't know what they mean. I also recognized half-life as something we had learned in physical science, but I don't remember anything about it or how to find it. Hopefully the text focus assigned to us tonight, and the lecture tomorrow will help clear up my confusion.