What is the difference between the core electrons and valence electrons ? Why do we emphasize the valence electrons in an atom when discussing atomic properties? 1.2 Ranking the following in order of increasing atomic radius O, S and F? 1.3 Explain why sizes atoms change when proceeding across a period of the periodic table.

Introductory Chemistry: An Active Learning Approach
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Chapter11: Atomic Theory :the Quantum Model Of The Atom
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1.1 What is the difference between the core electrons and valence electrons ? Why do we emphasize the valence electrons in an atom when discussing atomic properties?

1.2 Ranking the following in order of increasing atomic radius O, S and F?

1.3 Explain why sizes atoms change when proceeding across a period of the periodic table.

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