A-Level Biology OCR A
Polar Oxygen Hydrogen Share Nucleus Water Electrons Positive
| Front |
Explain why water is a polar molecule. |
| Back |
Water as a polar molecule- Oxygen and hydrogen atoms are bonded covalently - they share electrons
- Because oxygen has a larger positive nucleus, the electrons are shared unequally and they spend more time closer to it than the small nucleus of hydrogen which means the bond is polar
- This causes the oxygen to become slightly negative because it has a greater share of negative electrons, meaning the hydrogen will be slightly positive (positive nucleus which has a smaller share of electrons)
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A-Level Biology OCR A