Practice Electron Gain Enthalpy (3.7.1.d) - Classification of Elements and Periodicity in Properties

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6 sample questions

Question 1.
Define Electron Gain Enthalpy.
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Think about the formation of anion.
Question 2.
What is the typical sign of ΔegH for halogens?
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Remember, they are eager to gain electrons.
3Question 3.
What is the electron gain enthalpy for a noble gas?
- Negative
- Positive
- Zero
- Undefined
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Which elements are stable?
4Question 4.
Is the electron gain enthalpy generally more negative across a period?
- True
- False
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Think about charge attraction.
Question 5.
Consider an atom with an electron gain enthalpy of -300 kJ/mol. Would you expect it to be a halogen or a noble gas? Justify your reasoning.
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Recall the typical ΔegH values for each group.
Question 6.
If an element in group 16 has a ΔegH of -150 kJ/mol, what can you infer about its reactivity compared to a group 17 element with a ΔegH of -350 kJ/mol?
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Evaluate the group trends and ΔegH implications.

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