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 80, takes its name from the Roman god of commerce, communication, and luck, known for his speed and mobility?
Mercury (Hg)
Tungsten (W)
Caesium (Cs)
Phosphorus (P)