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Explain why the first ionisation energy is lower for Al than Mg? O The valence electron in Al is less shielded from the nucleus and so the electron will observe a larger effective nuclear charge. O The valence electron is removed from the 3s orbital for Al rather than 3p orbital for Mg O This atomic radius of Al is larger therefore the valence electron is further away from the nucleus. O The valence electron in Mg is more shielded from the nucleus and so the electron will observe a larger effective nuclear charge. O The electronegativity of Mg is greater than Al and so will result in Mg having a higher tendency to attract covalently bound electrons. O The valence electron is removed from the 3p orbital for Al rather than 3s orbital for Mg

Explain why the first ionisation energy is lower for Al than Mg? O The valence electron in Al is less shielded from the nucleus and so the electron will observe a larger effective nuclear charge. O The valence electron is removed from the 3s orbital for Al rather than 3p orbital for Mg O This atomic radius of Al is larger therefore the valence electron is further away from the nucleus. O The valence electron in Mg is more shielded from the nucleus and so the electron will observe a larger effective nuclear charge. O The electronegativity of Mg is greater than Al and so will result in Mg having a higher tendency to attract covalently bound electrons. O The valence electron is removed from the 3p orbital for Al rather than 3s orbital for Mg

Principles of Modern Chemistry
Principles of Modern Chemistry
8th Edition
ISBN:9781305079113
Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Chapter3: Atomic Shells And Classical Models Of Chemical Bonding
Section: Chapter Questions
Problem 7P
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Explain why the first ionisation energy is lower for Al than Mg? O The valence electron in Al is less shielded from the nucleus and so the electron will observe a larger effective nuclear charge. O The valence electron is removed from the 3s orbital for Al rather than 3p orbital for Mg O This atomic radius of Al is larger therefore the valence electron is further away from the nucleus. O The valence electron in Mg is more shielded from the nucleus and so the electron will observe a larger effective nuclear charge. O The electronegativity of Mg is greater than Al and so will result in Mg having a higher tendency to attract covalently bound electrons. O The valence electron is removed from the 3p orbital for Al rather than 3s orbital for Mg
Transcribed Image Text:Explain why the first ionisation energy is lower for Al than Mg? O The valence electron in Al is less shielded from the nucleus and so the electron will observe a larger effective nuclear charge. O The valence electron is removed from the 3s orbital for Al rather than 3p orbital for Mg O This atomic radius of Al is larger therefore the valence electron is further away from the nucleus. O The valence electron in Mg is more shielded from the nucleus and so the electron will observe a larger effective nuclear charge. O The electronegativity of Mg is greater than Al and so will result in Mg having a higher tendency to attract covalently bound electrons. O The valence electron is removed from the 3p orbital for Al rather than 3s orbital for Mg
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