

U4L3 DE GP - Fri Dec 12 - 7.4 Ionization Energy and Electron Aff
Presentation
•
Chemistry
•
11th Grade
•
Hard
Standards-aligned
Mikhail Kuchuk
FREE Resource
10 Slides • 20 Questions
1
2
3
Multiple Choice
Ionization energy measures the energy change when an atom:
Gains an electron to form an anion
Loses an electron to form a cation
Shares electrons with another atom
Absorbs light and becomes excited
4
Multiple Choice
Electron affinity measures the energy change when an atom:
Gains an electron
Loses an electron
Shares electrons equally
Transfers a proton
5
Multiple Choice
Which statement correctly defines ionization energy?
The energy released when an atom accepts an electron
The energy needed to add a proton to the nucleus
The minimum energy needed to remove an electron from an atom
The energy change when two atoms form a bond
6
Multiple Choice
Which statement correctly defines electron affinity?
The energy required to remove an electron from an anion
The energy change when an electron is added to an atom
The attraction between two bonded atoms
The energy needed to break an ionic bond
7
8
Match
Match each reaction equation to the correct ionization energy it represents.
First ionization energy
Second ionization energy
Third ionization energy
Al → Al⁺ + e⁻
Al⁺ → Al²⁺ + e⁻
Al²⁺ → Al³⁺ + e⁻
Al → Al⁺ + e⁻
Al⁺ → Al²⁺ + e⁻
Al²⁺ → Al³⁺ + e⁻
9
Match
Match each reaction equation to the correct ionization energy it represents.
First ionization energy (I1)
Second ionization energy (I2)
Third ionization energy (I3)
Na → Na⁺ + e⁻
Na⁺ → Na²⁺ + e⁻
Na²⁺ → Na³⁺ + e⁻
Na → Na⁺ + e⁻
Na⁺ → Na²⁺ + e⁻
Na²⁺ → Na³⁺ + e⁻
10
11
Match
Match each reaction equation to the correct electron affinity it represents.
First electron affinity
Second electron affinity
Third electron affinity
N + e⁻ → N⁻
N⁻ + e⁻ → N²⁻
N²⁻ + e⁻ → N³⁻
N + e⁻ → N⁻
N⁻ + e⁻ → N²⁻
N²⁻ + e⁻ → N³⁻
12
Match
Match each reaction equation to the correct electron affinity it represents.
First electron affinity
Second electron affinity
Third electron affinity
Cl + e⁻ → Cl⁻
Cl⁻ + e⁻ → Cl²⁻
Cl²⁻ + e⁻ → Cl³⁻
Cl + e⁻ → Cl⁻
Cl⁻ + e⁻ → Cl²⁻
Cl²⁻ + e⁻ → Cl³⁻
13
14
Multiple Choice
The first ionization energy of magnesium is +738 kJ/mol. This positive value indicates that:
Energy must be put into the atom to remove an electron
Energy is given off when an electron is removed
Magnesium cannot form a cation
The process happens spontaneously
15
Multiple Choice
The first ionization energy of potassium is +419 kJ/mol. What does this tell us about removing an electron from potassium?
The process releases energy
Potassium resists losing electrons
Energy must be supplied to remove the electron
Potassium cannot form ions
16
Multiple Choice
Lithium has a first ionization energy of 520 kJ/mol. Fluorine has a first ionization energy of 1681 kJ/mol. Which element is more likely to form a cation?
Lithium, because less energy is required to remove an electron
Lithium, because more energy is required to remove an electron
Fluorine, because less energy is required to remove an electron
Fluorine, because more energy is required to remove an electron
17
Multiple Choice
Cesium has a first ionization energy of 376 kJ/mol. Helium has a first ionization energy of 2372 kJ/mol. Which element is more likely to form a cation?
Helium, because less energy is required to remove an electron
Helium, because more energy is required to remove an electron
Cesium, because less energy is required to remove an electron
Cesium, because more energy is required to remove an electron
18
19
Multiple Choice
The electron affinity of sulfur is −200 kJ/mol. This negative value indicates that:
Energy must be added for sulfur to gain an electron
Energy is released when sulfur gains an electron
Sulfur cannot form an anion
The sulfide ion is unstable
20
Multiple Choice
The electron affinity of iodine is ~295 kJ/mol. What does this tell us about adding an electron to iodine?
The process requires energy input
Iodine resists gaining electrons
Energy is released when the electron is added
The iodide ion is less stable than the iodine atom
21
Multiple Choice
Oxygen has an electron affinity of −141 kJ/mol. Beryllium has an electron affinity of +240 kJ/mol. Which element is more likely to form an anion?
Oxygen, because more energy is released when it gains an electron
Oxygen, because less energy is released when it gains an electron
Beryllium, because more energy is released when it gains an electron
Beryllium, because less energy is released when it gains an electron
22
Multiple Choice
Sulfur has an electron affinity of −200 kJ/mol. Sodium has an electron affinity of −53 kJ/mol. Which element is more likely to form an anion?
Sulfur, because more energy is released when it gains an electron
Sulfur, because less energy is released when it gains an electron
Sodium, because more energy is absorbed when it gains an electron
Sodium, because less energy is absorbed when it gains an electron
23
24
25
Multiple Choice
Based on periodic trends in ionization energy, which element would most easily lose an electron?
Rubidium (Group 1A)
Bromine (Group 7A)
Phosphorus (Group 5A)
Argon (Group 8A)
26
Multiple Choice
Based on periodic trends in ionization energy, which element would most easily lose an electron?
Nitrogen (Group 5A)
Oxygen (Group 6A)
Lithium (Group 1A)
Neon (Group 8A)
27
28
29
Multiple Choice
Based on periodic trends in electron affinity, which element would most readily gain an electron?
Lithium (Group 1A)
Fluorine (Group 7A)
Helium (Group 8A)
Barium (Group 2A)
30
Multiple Choice
Based on periodic trends in electron affinity, which element would most readily gain an electron?
Cesium (Group 1A)
Xenon (Group 8A)
Strontium (Group 2A)
Iodine (Group 7A)
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