Which element is represented by the symbol 'O' on the periodic table?
Category: Knowledge · Difficulty: medium
Hint: It's essential for life and can be found in the air we breathe.
Answer
Oxygen
Explanation
Oxygen is represented by the letter 'O' and is vital for the respiration of most living organisms.
This is a medium knowledge riddle — a moderate challenge for most people. The answer is Oxygen.
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