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Questions and Answers
Which group in the periodic table has elements with high endothermic ionization energies and very negative exothermic first electron affinities?
Which group in the periodic table has elements with high endothermic ionization energies and very negative exothermic first electron affinities?
- Group 17 (halogens) (correct)
- Group 1 (alkali metals)
- Group 16 (chalcogens)
- Group 2 (alkaline earth metals)
What charge do atoms in Group 17 typically form when they gain an electron?
What charge do atoms in Group 17 typically form when they gain an electron?
- +1
- 0
- -1 (correct)
- +2
What is the electron affinity of silicon, and how does it compare to that of phosphorus?
What is the electron affinity of silicon, and how does it compare to that of phosphorus?
- Both silicon and phosphorus have the same electron affinity of –72 kJ/mol.
- Silicon has an electron affinity of –134 kJ/mol, while phosphorus has –72 kJ/mol. (correct)
- Silicon has an electron affinity of –72 kJ/mol, while phosphorus has –134 kJ/mol.
- Silicon has a higher electron affinity than phosphorus due to its atomic mass.
What primarily causes the difference in electron affinities between silicon and phosphorus?
What primarily causes the difference in electron affinities between silicon and phosphorus?
Which statement best explains why the electron affinities of elements vary significantly?
Which statement best explains why the electron affinities of elements vary significantly?
Flashcards
Halogens Group 17
Halogens Group 17
Elements in Group 17 of the periodic table with high ionization energy (IE1) and exothermic electron affinity (EA1).
High Ionization Energy (IE1)
High Ionization Energy (IE1)
High energy needed to remove an electron from an atom.
Electron Affinity (EA1)
Electron Affinity (EA1)
Energy change when an atom gains an electron
Silicon Electron Affinity
Silicon Electron Affinity
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Phosphorus Electron Affinity
Phosphorus Electron Affinity
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Study Notes
Group 17 Elements
- Elements in Group 17 (halogens) exhibit high endothermic ionization energies (IE1) and very negative (exothermic) first electron affinities (EA1).
- These atoms readily gain an electron to form a −1 charged ion.
Electron Affinity Differences (Silicon and Phosphorus)
- Silicon's electron affinity is –134 kJ/mol, while phosphorus's is –72 kJ/mol.
- This difference is likely due to the electronic configuration of the atoms and the stability of their resultant ions.
Electron Affinities
- The electron affinities of elements vary significantly due to factors influencing the stability of the resultant ion.
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