Respuesta :

Answer:

5

Explanation:

The first shell of an atom always contains 2 electrons, every other shell can contain up to 8 electrons each.

NabilaAli

Answer:

Five electrons

Explanation:

Nitrogen has 7 electrons --- 2 in the first shell, and 5 in the second shell (so five valence electrons). Oxygen has 8 electrons --- 2 in the first shell, and 6 in the second shell (so six valence electrons).

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