A free radical is an atom or molecule that has an odd number of what?

More Questions:

Which Mario Kart game first featured 12 racers instead of 8?

What animal is on the cover of the Beach Boys" album "Pet Sounds"?

When did "Macho Man" Randy Savage die?

What did the Lady of the Lake give King Arthur?

What year was Strongbow cider introduced to the market?

Pierre is the capital of which US state?

In what city would you find the most famous street named "Peachtree Street"?

Which US state is home to a city called Truth or Consequences?

Vienna is the capital of which European country?

What Lamborghini model does Bruce Wayne drive in the movie "Batman Begins"?

In The Simpsons, when Ned Flanders started his own store, he quit his job as what?

What is the name of the Green Hornet's car?

The cobnut is the fruit of what tree?

Which side of the brain is responsible for logic and rational thought?

The original "Mission Impossible" TV series ran for how many seasons?