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Water has polar covalent bonds.

Water has polar covalent bonds.

Unshared pairs of electrons are not part of water's covalent bond.

Water's bonding electrons are shared unequally; electron density is greatest around the oxygen atom.

Water's bonding electrons are shared unequally; electron density is greatest around the oxygen atom.

2.11 The Polar Covalent Bond in the Water Molecule (a) A covalent bond between atoms with different electronegativities is a polar covalent bond, and has partial (8) charges at the ends. (b) In water, the electrons are displaced toward the oxygen atom and away from the hydrogen atoms.

Hydrogen H bonds

fTh e hydrogen bond is a weak attraction shared between two electronegative atoms.

Two water molecules Two parts of one large molecule (or two large molecules)

2.12 Hydrogen Bonds Can Form between or within Molecules

Hydrogen bonds can form between two molecules or, if a molecule is large, between two different parts of the same molecule. Covalent and polar covalent bonds, on the other hand, are always found within molecules.

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Essentials of Human Physiology

Essentials of Human Physiology

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