Practice Electron Affinity (2.4) - Unit 3: Periodicity

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6 sample questions

Question 1.
What is electron affinity?
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Think about gaining an electron.
Question 2.
Which direction does electron affinity generally trend as you move across a period?
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Remember effective nuclear charge.
3Question 3.
What does electron affinity measure?
- Energy required to remove an electron
- Energy change when an electron is added
- Energy associated with nuclear reactions
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Consider the process of gaining an electron.
4Question 4.
True or False: Electron affinity increases down a group.
- True
- False
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How does distance from the nucleus affect attraction?
Question 5.
Consider fluorine and bromine. Compare their electron affinities and explain why fluorine is more exothermic than bromine.
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Focus on their atomic structures and distances from the nucleus.
Question 6.
An element has an electron affinity of +100 kJ/mol. Discuss what this indicates about the element's ability to gain an electron and its possible reactivity.
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Think about how energy relates to stability.

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