An atom in the ground state contains a total of 5 electrons 5 protons and 5 neutrons. which lewis electron-dot diagram represents this atom

I don't know if you didn't gave a picture choice or if i didn't get the picture.
But lets call this atom A. Electron dot formula doesn't require Neutron and Protons, its main concern is valance elections.

So atom A has 5 electrons which means 2,3 it has 3 valance electrons. Its dot formula will become
:A.

I hope this helped.

C)sodium hydroxide

Explanation:

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