Sodium reacted with pure oxygen, image 2 of 2. The reaction produced clouds of white sodium oxide (NaO). Sodium (Na) is a very reactive metal that must be stored under oil as it reacts with oxygen (O2) in the atmosphere. The equation for this reaction is: 2Na + O2 ---> 2NaO For an image of the combustion jar during the fiery reaction, see image A510/211.
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