kassyestrada kassyestrada

14-10-2019
Chemistry

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Helium is considered a noble gas because it has a ___ valence electron shell.

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joseaaronlara joseaaronlara

14-10-2019

Answer:

Two valence electron Shell or it could be zero because it do not react.

Explanation:

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Аноним Аноним

14-10-2019

Answer:

Complete.

Explanation:

The noble gases are stable and do not generally react with other chemicals.

Electron configuration of helium is 1s2.

The inner electron shell 1s is complete (stable) when containing 2 electrons

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