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Elemental sodium actually exists as a metallically bonded solid. It is customary to write the formula of solid sodium as "Na". It would not be correct to write "Na2", because in a metallically bonded solid every atom is equally strongly bonded to each of its several nearest neighbors, always more than 2, in the crystal lattice.

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Q: Does sodium exist as Na or Na 2?
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What is the name of the of the ion Na?

Na+ is called a sodium ion or sodium cation.


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The chemical formula of sodium nitrate is NaNO3. Na(II) doesn't exist !


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Sodium: Na or the ion Na+ Carbonate: (CO3)2-


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A new ionic species - Na- (it does not exist) Perhaps you meant the loss of an electron? In this case, sodium readily loses an electron to form Na+.


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