Why is Water a polar molecule?

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In my mind, this would give the Hydrogens and the Oxygen a negative charge, as, after the electrons have been shared, they all have more electrons than protons. So, why, in a water molecule, is the Hydrogen end slightly positive??

And also, if all the elements in simple covalent molecule have a full outer electron shell, giving them a negative charge, why do Hydrogen atoms attract lone electrons in the outer shell of other atoms in neighbouring molecules, to form the inter-molecular Hydrogen bon

Please help.

I didn't find the right solution from the Internet.


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