Mrs Roberts: So, the chemical symbol is Al. See if you can see it in the periodic table. Cal: OK. It is. It's on the right hand side. It's right there. Magic. OK, well I might have been able to ...

At that time, he had only 50 elements to arrange ... The section in the middle of the table is called the Transition Metals. If you know what one of the elements in a group is like, you can ...