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Electron Configurations and Periodic Properties
Name:___________________
Guided Inquiry
Period:____
Objective: You have learned how the atoms are arranged and how to determine the electron configurations
for atoms. Now we need to look at the relationship between electron configurations and periodic trends.
For this assignment, you will need Modern Chemistry, pp.140-152 (You may skip the section on Electron
Affinity, pp147-148). Please put the answers into your own words.
Atomic Radius
1. Define atomic radius:
2. What is the trend for atomic radius as you go from left to right on the periodic table?
3. What causes the trend for atomic radius as you go from left to right on the periodic table?
4. What is the trend for atomic radius as you go from top to bottom on the periodic table?
5. What causes the trend for atomic radius as you go from top to bottom on the periodic table?
Ionization Energy
1. Define ionization energy:
2. What is the trend for ionization energy as you go from left to right on the periodic table?
3. What causes the trend for ionization energy as you go from left to right on the periodic table?
4. What is the trend for ionization energy as you go from top to bottom on the periodic table?
5. What causes the trend for ionization energy as you go from top to bottom on the periodic table?
Electron Configurations and Periodic Properties
Guided Inquiry
Ionic Radius
Name:___________________
Period:____
1. Define cation:
2. Define anion:
3. What types of ions do metals tend to form? What happens to the radius of this type of ion compared
to its atom?
4. What types of ions do nonmetals tend to form? What happens to the radius of this type of ion
compared to its atom?
Electronegativity
1. Define electronegativity:
2. What is the trend for electronegativity as you go from left to right on the periodic table?
3. What causes the trend for electronegativity as you go from left to right on the periodic table?
4. What is the trend for electronegativity as you go from top to bottom on the periodic table?
5. What causes the trend for electronegativity as you go from top to bottom on the periodic table?
Practice Problems
1. Place these elements in order of increasing atomic radius: Cs, Bi, Rn, Au, Hf
2. Place these elements in order of decreasing ionization energy: Li, O, C, K, Ne, F
3. Place these elements in order of increasing electronegativity: Sr, Cl, Ra, In, As