Top network posts

• 18 Is it possible for a substance to absorb a longer wavelength of EM wave and emit a shorter wavelength?
• 17 Why does bond angle decrease in the order H2O, H2S, H2Se?
• 14 What is resonance, and are resonance structures real?
• 13 Is there any empirical upper limit for order of reaction?
• 13 Can magnetic fields affect a chemical reaction?
• 12 Uv vis and fluorescence spectroscopy: sensitivity
• 12 Why is the magnesium(II) ion preferred over other ions in chlorophyll?
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