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 62, takes its name from a mineral named after Colonel Vasili Samarsky-Bykhovets, a Russian mine official?
Cerium (Ce)
Lawrencium (Lr)
Samarium (Sm)
Potassium (K)