L11 - The first ionization energy, IE 1 , is the amount of...

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Unformatted text preview: The first ionization energy, IE 1 , is the amount of energy required to remove an electron from a gaseous atom: Na( g ) Na + ( g ) + e- E= IE 1 . The second ionization energy, IE 2 , is the energy required to remove an electron from a gaseous ion: Na + ( g ) Na 2+ ( g ) + e- E= IE 2 (IE 2 >IE 1 ). The larger the ionization energy, the more strongly the electron is bound. Ionization Energy FOLLOW-UP PROBLEM 8.5 Identifying an Element from Successive Ionization Energies PLAN: PROBLEM: Element Q is in Period 3 and has the following ionization energies (in kJ/mol): IE 1 IE 2 IE 3 IE 4 IE 5 IE 6 577 1816 2744 11576 14829 18375 Look for a large increase in energy which indicates that all of the valence electrons have been removed. Name element Q and write its electron configuration. FOLLOW-UP PROBLEM 8.5 Identifying an Element from Successive Ionization Energies PLAN: PROBLEM: Element Q is in Period 3 and has the following ionization energies (in kJ/mol): IE 1 IE 2 IE 3 IE 4 IE 5 IE 6 577 1816 2744 11576 14829 18375 Look for a large increase in energy which indicates that all of the valence electrons have been removed. Name element Q and write its electron configuration. FOLLOW-UP PROBLEM 8.5 Identifying an Element from Successive Ionization Energies PLAN: SOLUTION: PROBLEM: Element Q is in Period 3 and has the following ionization energies (in kJ/mol): IE 1 IE 2 IE 3 IE 4 IE 5 IE 6 577 1816 2744 11576 14829 18375 Look for a large increase in energy which indicates that all of the valence electrons have been removed. The largest increase occurs after IE 3 , that is, after the 3rd valence electron has been removed. Three electrons would mean that the valence configuration is 3s 2 3p 1 and the element must be aluminum, Al (Z = 13). Name element Q and write its electron configuration. FOLLOW-UP PROBLEM 8.5 Identifying an Element from Successive Ionization Energies PLAN: SOLUTION: PROBLEM: Element Q is in Period 3 and has the following ionization energies (in kJ/mol): IE 1 IE 2 IE 3 IE 4 IE 5 IE 6 577 1816 2744 11576 14829 18375 Look for a large increase in energy which indicates that all of the valence electrons have been removed....
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This note was uploaded on 04/20/2008 for the course CHEM 111 taught by Professor Grzegorz during the Spring '08 term at Colorado State.

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L11 - The first ionization energy, IE 1 , is the amount of...

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