AP Biology Animations

The Chemical Basis of Life

Elements, Atoms, And Molecules

Chemical Bonds

Elements, Atoms, And Molecules

Periodic Table.swf

Elements, Atoms, And Molecules

Elements Song

2.1 Living organisms are composed of about 25 chemical elements

The Structure of Atoms

2.4 Atoms consist of protons, neutrons, and electrons

Atomic Symbols, Atomic Numbers, and Mass Numbers

2.4 Atoms consist of protons, neutrons, and electrons

Electron Arangement

2.4 Atoms consist of protons, neutrons, and electrons

Electron Configurations

2.6 Electron arrangement determines the chemical properties of an atom

Atomic Structure and Ionic Bonding

2.6 Electron arrangement determines the chemical properties of an atom
2.7 Ionic bonds are attractions between ions of opposite charge

Ionic Bonds 1

2.7 Ionic bonds are attractions between ions of opposite charge

Ionic Bonds 2

2.7 Ionic bonds are attractions between ions of opposite charge

Covalent Bonds 1

2.8 Covalent bonds join atoms into molecules through electron sharing

Covalent Bonds 2

2.8 Covalent bonds join atoms into molecules through electron sharing

Hydrogen Bonding Attractive Force

2.10 Hydrogen bonds are weak bonds important in the chemistry of life

A Closer Look at Water

2.10 Hydrogen bonds are weak bonds important in the chemistry of life

Structure of Water

2.10 Hydrogen bonds are weak bonds important in the chemistry of life

Water and Life

Water’s Life-Supporting Properties

A Quick Look at How Ionic Compounds Dissolve

2.14 Water is the solvent of life

Molecular View of Solution Formation

2.14 Water is the solvent of life

Salt Dissolving in Water

2.14 Water is the solvent of life

Proton Exchange Between Water Molecules

2.15 The chemistry of life is sensitive to acidic and basic conditions

Water & pH

2.15 The chemistry of life is sensitive to acidic and basic conditions