To expose unfair judging practices at a contest
I'm so sorry if this isin't the answer, please don't attack me!
A seven letter word containing thousands of letters - a mailbox.
The word mailbox has 7 letters, and it contains thousands of letters - just not the letters from the alphabet, but rather a form of a paper message.
Answer:
Nucleus
Explanation:
The nucleus (or center) of an atom is made up of protons and neutrons.
It should be the first sentence? should be a bit more specific on the question
