Some that I didn't know are: Americium, Europium, Einsteinium, Californium, Indium, Neptunium, and Rutherfordium.
I think my favorites are Antimony, Tin, and Mercury.
I've been using this game on sporcle.com, a website with a bunch of educational games that are super simple and actually pretty fun.
The website also has games in which you must name US states, countries of each continent, seven deadly sins, 10 commandments, and so much more. No, I'm not getting paid to advertise for them, I just really like trivia.
