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Unit: Chemistry of life

About this unit

This unit is part of the Biology library. Browse videos, articles, and exercises by topic.

Elements and atoms

Learn what matter is made of! We'll cover elements, atoms, and subatomic particles (protons, neutrons, and electrons). We'll also check out isotopes, radioactivity, and carbon dating.

Learn

Elements and atoms
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Matter, elements, and atoms
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Introduction to the atom
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Atomic number, atomic mass, and isotopes
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Practice

Atomic structure
4 questions

Electron shells and orbitals

Learn how electrons are organized in atoms! We will cover the Bohr model, electron shells, and orbitals, as well as periodic table trends in electron configurations and reactivity.

Learn

Shells, subshells, and orbitals
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Valence electrons and ionic compounds
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Groups of the periodic table
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The periodic table, electron shells, and orbitals
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Find out how atoms interact with each other to form bonds! We'll look at the different types of strong bonds, including nonpolar covalent, polar covalent, and ionic bonds, as well as weak bonds such as hydrogen bonds and London dispersion forces.