AP BIOLOGY

Detailed explanation-1: -2: The electrons in the covalent bond connecting the two hydrogens to the atom of oxygen in a water molecule spend more time on the oxygen atom. This gives the oxygen atom a slightly negative charge (since electrons are negatively charged).

Detailed explanation-2: -Oxygen in water is negative because a negative charge, unlike a positive, can be stabilized using ground state ionic resonance structures.

Detailed explanation-3: -Therefore, a water molecule has an equal amount of positive and negative charge which is 1.33×107C. Note:Water is formed by the sharing of electrons between two hydrogen atoms and one oxygen atom through the formation of a covalent bond.

Detailed explanation-4: -Organic Chemistry An oxygen atom is much more electronegative than carbon or hydrogen atoms, so both carbon-oxygen and hydrogen-oxygen bonds are polar. The oxygen atom is slightly negatively charged, and the carbon and hydrogen atoms are slightly positively charged.

Detailed explanation-5: -The oxygen is the negative end of the molecule, while the area between the hydrogen atoms is the positive end of the molecule. Figure 15.1. 2: Water is a polar molecule, as greater electron density is found around the more electronegative oxygen atom.