Predicting Properties with the Periodic Table
Learning Objective
I can use the periodic table as a model to predict the relative properties of elements based on the patterns of electrons in the outermost energy level of atoms.
Key Concepts
According to Coulomb's Law, the magnitude of force between two charged particles is proportional to the product of their charges divided by the distance between them squared.
The effective nuclear charge (Zeff) is the charge felt by valence electrons, and it can be approximated by the atomic number minus the number of core electrons.
Ionization energy generally increases as you move up and to the right on the periodic table, while atomic radius generally decreases in the same direction.
Practice Questions
This lesson includes 12 practice questions to reinforce learning.
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1. According to Coulomb's Law, what two factors most influence the force between charged particles?
2. What is the effective nuclear charge (Zeff)? How is it calculated, according to the video?
3. Explain how the effective nuclear charge changes as you move from left to right across a period on the periodic table.
...and 9 more questions
Educational Video
Periodic trends and Coulomb's law | Atomic structure and properties | AP Chemistry | Khan Academy
Khan Academy