Atomic Structure
Electron shells, orbitals and the periodic table: the foundation of all chemistry
In the beginning...
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Lessons
How the model of the atom changed
The gold foil experiment
Practice: Read the evidence
Protons, neutrons and electrons
Inside a carbon atom
Practice: Sort the particles
Atomic number and mass number
Practice: Count the particles
Isotopes
Practice: Spot the isotope
Relative atomic mass
Practice: Calculate relative atomic mass
Electron shells
Filling the shells
Practice: Fill the shells
Inside the shells: s, p and d
Shells and the periodic table
Practice: Find the element
Ions
Practice: Make the ion
Why the outer shell matters
Practice: Atomic structure review
Course Complete
Up next
What is an atom?
Explore the building blocks of all matter. Learn about subatomic particles, electron configurations, isotopes, and how the periodic table is organised.
Launch Lesson