Senior Chemistry (SCH4U Mastery) (2026 Edition) | Fun Learni
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Can you solve these mystery puzzles?
You're analyzing the electron configuration of a transition metal. According to the Quantum Mechanical Model, why does a 4s orbital fill before the 3d orbital for potassium (Z=19), even though the 3d orbital is lower in principal quantum number?
When writing the electron configuration for oxygen (Z=8), you correctly place two electrons in the 2p orbitals. But why does Hund's rule require one electron per p orbital before any pairing occurs?
In a chemical bond, the electronegativity difference between atoms determines bond polarity. If you have a bond between sulfur (EN 2.58) and chlorine (EN 3.16), which statement best describes the nature of the bond?
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