Part J Electronic Configuration, Periodic Table and periodic trends 4 slides per page

Consequently the outer electrons feel a stronger

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Unformatted text preview: an increased nuclear charge and the electrons are going into the same shell (2s and 2p or 3s and 3p, etc.). – Consequently, the outer electrons feel a stronger effective nuclear charge. Atomic Radii • Example : Arrange these elements based on their decreasing atomic radii. – P, Cl, S, Si – Ga, F, S, As Less shielded e- , less expanded valence shell INCREASING ATOMIC SIZE INCREASING ATOMIC SIZE Since the inner electrons of group 1 and 2 elements represent the inert gas core (the previous inert gas), they experience the strongest shielding, therefore the valence electrons expand outward. More shielded e-, more expanded valence shell Ionic Radii • Cations (positive ions) are always smaller than their respective neutral atoms. Removal of valence electron leaves the inner core (smaller size) • Anions (negative ions) are always larger than their neutral atoms. Addition of electron into the valence orbital results in repulsion, th...
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This document was uploaded on 03/26/2014.

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