Electronegativity and Ionization Energy Trends
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Objective
I can explain how electronegativity and ionization energy change across periods and groups in the periodic table.
Part 1 of 4
Warm-up video
Khan Academy · 10:43Vetted channel
We don't generate video — this one is by Khan Academy on YouTube. The practice questions and exit ticket below were drafted by AI for this objective, and every question is editable in the teacher guide.
Part 2 of 4
Key concepts
3 concepts
- 1
Coulomb's law states that the magnitude of the force between two charged particles is proportional to the charge on each particle and inversely proportional to the square of the distance between them.
- 2
Effective nuclear charge (Zeff) is the net positive charge experienced by valence electrons in an atom and can be approximated by subtracting the number of core electrons from the atomic number.
- 3
Ionization energy generally increases across a period (from left to right) and decreases down a group, while atomic radius generally decreases across a period and increases down a group.
Part 3 of 4
Practice
6 questions
According to Coulomb's Law, what two factors most influence the force between charged particles?
How is effective nuclear charge (Zeff) calculated, and what does it represent?
Part 4 of 4
Exit ticket
Quick comprehension check
“Explain how electronegativity changes as you move from left to right across a period and from top to bottom down a group in the periodic table. Relate this trend to Coulomb's Law.”
Sample answer included in the free materials
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