* Oxygen's Strong Pull: Oxygen is highly electronegative, meaning it has a strong attraction for electrons. In a hydroxide ion (OH-), the oxygen atom pulls the shared electrons in the covalent bond with hydrogen closer to itself.
* Uneven Sharing: This uneven sharing of electrons creates a partial negative charge on the oxygen atom and a partial positive charge on the hydrogen atom.
* The Lone Pair: Oxygen also has two lone pairs of electrons that are not involved in bonding. These lone pairs further contribute to the negative charge on the oxygen atom.
* Overall Charge: The combined effect of oxygen's electronegativity and the lone pairs gives the hydroxide ion a net negative charge.
In simpler terms: The oxygen atom in hydroxide is like a magnet for electrons, making the whole molecule "electron-rich" and thus negatively charged.
