A-Level Chemistry | Fun Learning Quest for Kids
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✨ Magical Challenges ✨
Can you solve these mystery puzzles?
You are analyzing the electron configuration of a Period 3 element. Its first ionisation energy is unexpectedly lower than that of the element immediately before it in the period. Which element is most likely exhibiting this anomaly, and what is the electronic reason?
A student draws a Lewis structure for a molecule with the formula NO₂⁻. They assign a formal charge of -1 to one oxygen atom and a formal charge of 0 to the nitrogen and the other oxygen. Is this the most plausible resonance structure?
You are predicting the shape of the xenon tetrafluoride (XeF₄) molecule using VSEPR theory. How many bonding pairs and lone pairs surround the central xenon atom, and what is the resulting molecular geometry?
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