Biology / Unit 1 Bio 0133 short lesson, about 20 seconds
Polar Covalent Bonds
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The idea
A polar covalent bond shares electrons unevenly between two atoms, because one pulls them closer than the other.
In practice
In a water molecule, oxygen pulls the shared electrons closer than hydrogen does, leaving oxygen slightly negative and each hydrogen slightly positive.
Where people slip
A polar bond still shares electrons — unevenness is a matter of degree, not a switch to an ionic bond.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Builds on
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