Question

describe the build-up of electrons in ‘shells’ and understand the significance of outer electrons (in terms of the Periodic Table) and the noble gas electronic structures.

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Answer 1

Explanation:

The number of electrons in an atom's outer shell are called valence electrons. ... This electronic structure is called stable, because they cannot lose or gain electrons to take part in chemical reactions. Thus noble gases do not combine with other elements to form compounds.

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