juncofabianne juncofabianne

15-10-2020
Chemistry

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How many electrons are there in the only energy level of helium, a noble gas? * Two Three Six Eight

Respuesta :

ysabelfranceska ysabelfranceska

15-10-2020

Answer:

Explanation:

Noble gases are the least reactive of all known elements. That's because with eight valence electrons, their outer energy levels are full. The only exception is helium, which has just two electrons.

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