4.1 - Filling of Principal Energy Levels (Periods 2 and 3)
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Practice Questions
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What is the electron configuration for Fluorine?
💡 Hint: Count the total number of electrons for Fluorine.
What trend is observed in atomic radius as you move across Period 2?
💡 Hint: Consider the increasing number of protons.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What is the electron configuration of Sodium?
💡 Hint: Sodium is in Period 3; think about filling order.
Which element has the highest effective nuclear charge in Period 2?
💡 Hint: Look at the position of the elements.
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Challenge Problems
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Explain the significance of electron configurations in predicting elemental properties. How would changes to the electronic structure affect reactivity?
💡 Hint: Consider examples of noble gases as stable structures.
Compare and contrast the atomic radius of elements in Period 2 and Period 3. What factors account for these differences?
💡 Hint: Think about the impact of additional electron shells.
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