ionization energy & electron affinity shireen rudina
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Ionization Energy & Electron Affinity
Shireen Rudina
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What is the last term in the electron configuration of Mg?
1. 2s1
2. 3s2
3. 2s2
4. 4s2
5. 1p6
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What is the last term in the electron configuration of Co?
1. 4d6
2. 3s2
3. 4d7
4. 4p6
5. 3d7
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What is the correct electron configuration of oxygen (O)?
1.
2.
3.
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Ionization energy Activity
Definition: The energy needed to remove an electron from an atom
Can also be IE2, IE3, etc.
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Effect of Suborbitals
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Effect of Z & Electron Shielding
Across rows: increased positive charge holds electrons tighter
Down rows: Shells are farther away from the nucleus and experience shielding
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IE1:Na: 498 Mg: 736Al: 577Si:787P: 1063
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Electron affinity
• Ability of an ion to gain electrons
• Can be positive or negative– Positive= prefers to not gain electron– Negative= prefers to gain an electron
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