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Does the periodic table explain the shell model, or does the shell model explain the periodic...

Does the periodic table explain the shell model, or does the shell model explain the periodic table? What is the relationship between the maximum number of electrons each shell can hold and the number of elements in each period of the periodic table? Which electrons are most responsible for the chemical properties of an atom?What is different about the noble gases (Group VIIIA) on the periodic table that make them unique compared to other elements? Descirbe their uniqueness based on the shell model and their chemical reactivity. Explain why these two concepts are related.Distinguish between metals, nonmetals and semiconductors on the periodic table. Explain how they form ions based on the shell model.

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