I love the textbooks we are using for high school integrated science, but the assessment questions that they have are really similar to the practice exercises. So, I went surfing for some quizzes on Atoms and Elements, here’s what I found:
The Atom Quiz: http://www.mcwdn.org/chemist/atom/atomquiz.html
Atomic Quiz: Same site, slightly different quiz: http://www.mcwdn.org/Physics/AtomicQuiz.html
Atom Basics Quiz: http://chemistry.about.com/library/weekly/blatomquiz.htm
Includes a basic atoms refresher, if you need it: http://chemistry.about.com/od/atomicmolecularstructure/a/aa062804a.htm
How Stuff Works Atom Quiz: http://science.howstuffworks.com/atoms-quiz.htm
Chem4Kids Atom Quiz: http://www.chem4kids.com/extras/quiz_atomintro/q01_yes.html
All About Atoms Quiz: http://www.quia.com/quiz/253521.html?AP_rand=2014661385
Atoms and Elements Quiz: http://school.discoveryeducation.com/quizzes/cc_karent/Quiz2Atoms.html
Element Names Practice:
Proton Don: Practice with the Element Names (symbols, spelling)
http://www.funbrain.com/periodic/index.html
Element flashcards game: http://education.jlab.org/elementflashcards/index.html
Element Names Quiz: http://www.kidzworld.com/quiz/2820-quiz-the-periodic-table-of-elements-trivia
Element Symbol Quiz: About.com
http://chemistry.about.com/library/weekly/bl031104a.htm
Science book.


