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

Al cl na p b o be n ionization energies group and

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Unformatted text preview: er than the preceding IE Ionization Energies • Example: Arrange these elements based on their increasing first ionization energies. – Al, Cl, Na, P – B, O, Be, N Ionization Energies Group and element IE1 (kJ/mol) IE2 (kJ/mol) IE3 (kJ/mol) IE4 (kJ/mol) IA Na IIA Mg IIIA Al IVA Si 496 738 578 786 4562 1451 1817 1577 6912 7733 2745 3232 9540 10,550 11,580 4356 Electron Affinity • Electron affinity is the amount of energy released when an electron is added to an isolated gaseous atom to form an ion with a 1- charge. • Electron affinity is a measure of an atom’s ability to form negative ions. • Symbolically: atom(g) + e- → ion-(g) + EA F(g) + e- F-(g) + 328 kJ/mole O(g) + e- O-(g) + 141 kJ/mole 10 1/28/2014 Electron Affinity Electron Affinity Electronegativity • Electronegativity (EN) is a measure of the tendency of an atom to attract electrons to itself when chemically combined with another element. – The most electronegative atom pulls electrons to itself, pulling also the electro...
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This document was uploaded on 03/26/2014.

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