Which bonding change occurs when UV radiation excites formaldehyde?

💡 Explanation

UV photon absorption promotes an electron to a higher energy antibonding molecular orbital; because electron density in antibonding orbitals weakens the carbon-oxygen bond, the bond stretches and distorts. Therefore the stability decreases, rather than sigma bond strengthening or dipolar changes.

• Which mechanism reduces electron mobility in silicon nanowire transistors?
• Which mechanism limits efficiency when designing a thermoelectric generator using bismuth telluride near room temperature?
• Which failure occurs when a capacitive proximity sensor detects rapid overvoltages?
• Which effect intensifies near black hole event horizons?
• Which consequence results when excessive **group velocity dispersion** distorts optical signals?
• Which outcome occurs when Arrhenius equation parameters fluctuate?