Answer:
Polar covalent molecule
A covalent bond in which the electrons are not shared equally, giving the bond some ionic character.
The atom which tends to attract these shared electrons, or more precisely speaking, the electron density of the bond towards itself is said to be electronegative .
For example, the bond between H and F in an HF molecule is a polar covalent bond. The F atom being more electronegative tends to attract the shared electrons towards itself.
Due to differences in electronegativity, different atoms will have a stronger pull on electrons, creating a dipole. This can be seen in water, H20. The oxygen atom has a much higher electronegativity than the hydrogen atoms. This leads the electrons shared between the atoms to spend a majority of their time in space around the oxygen atom. Because electrons carry a negative charge, their increased presence around oxygen creates a partially negative pole there, and their absence from hydrogen creates a partially positive pole on the opposing end.
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