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Electronegativity is a measure of an atom's ability to attract shared electrons to itself. On the periodic table, electronegativity generally increases as you move from left to right across a period and decreases as you move down a group. As a result, the most electronegative elements are found on the top right of the periodic table, while the least electronegative elements are found on the bottom left.

Sections:
00:00 - Electronegativity vs electron affinity
00:45 - Covalent bonding and electronegativity
01:59 - Water molecule example
03:43 - Unequal electron sharing in water
05:00 - Importance in chemistry and organic reactions
05:19 - Electronegativity trend across a period
07:16 - Electronegativity trend down a group
08:41 - Most and least electronegative elements
09:39 - Summary of periodic trend in electronegativity

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