Translation of radioactivity in Spanish

You can always write me and we can learn together any language you want. How long you have taken classes? Was it only at night or on weekends? Makes me wonder how someone can be so fluent in Spanish.
I have many hobbies. I like to go to the movies (thriller), I am enjoying to hear the radio, and I like to meet friends for coffee, I like to read and I like to watch DVDs at my house.
Which region in Germany are you from? I live in Aarau in the state of Argau, that is in the middle of Switzerland not far from Zurich, Lake Zurich and near the border city of Basel.