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

Example noble gases all of them have completely

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Unformatted text preview: classification scheme of the elements based on their electron configurations. – Example - Noble Gases • All of them have completely filled electron shells. – Since they have similar electronic structures, their chemical properties are similar. • • • • • • He Ne Ar Kr Xe Rn 1s2 [He] 2s2 2p6 [Ne] 3s2 3p6 [Ar] 4s2 3d10 4p6 [Kr] 5s2 4d10 5p6 [Xe] 6s2 4f14 5d10 6p6 Other forms of the Periodic Table 6 1/28/2014 Periodic Trends Atomic Radii 7 1/28/2014 Atomic Radii • Decreases across a period due to shielding or screening effect. – Effective nuclear charge, Zeff, experienced by an electron is less than the actual nuclear charge, Z. – The inner electrons block the nuclear charge’s effect on the outer electrons, thereby expanding the orbitals of these outer electrons • Moving across a period, each element has...
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This document was uploaded on 03/26/2014.

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