Which property change occurs when an atom's valence orbital hybridization shifts from sp3 to sp2?

💡 Explanation

When orbital hybridization shifts from sp3 to sp2, the geometry around the atom changes because sp2 orbitals arrange in a trigonal planar structure, leading to larger bond angles (~120°) compared to the tetrahedral arrangement of sp3. Therefore, increased bond angles result, rather than electronegativity, paramagnetism, or reactivity shifts which have distinct mechanisms.

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