What is Sodium reacting with air in a balanced chemical reaction

Posted on 2014-03-13 10:49:00 in Chemistry by KATIE

Ok so I have some chemistry homework and I need some clarification. what is sodium reacting with air in a balanced chemical reaction? So far I have;

2Na(s)+O2(g)=2N?2O?2

But I'm not sure if it is;

4Na(s) + O2(g) ? 2Na?2O(s)

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