Instructions 20Q Game: These are similar to full games, but for quizzes larger than 20 questions it will randomly select 20 questions from within the set. This is a quick way to get in some studying of a topic.     
What element, atomic number 69, takes its name from the ancient name for an unclear northern location?
Thulium (Tm)
Ytterbium (Yb)
Potassium (K)
Fluorine (F)