In order for sodium to have 8 valence electrons it would need to either gain electrons or lose electron.

7

Explanation:

sodium has 1 valence electron because of its place on the periodic table. a trick to use is included in the picture below to find out how many valence electrons an element has. to get from 1 to 8 we add 7.

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i believe that it is a exoplanet

answer; talc and gypsum;