Unit 1 of 9Gatekeeper unitAdvanced Placement (AP)
Atomic Structure & Properties
Work through these 5 topics in order. Clear the gatekeeper and the rest of the course opens up.
01
Moles & Molar Mass
The mole, Avogadro’s number and mass–mole conversions.
Start here
02
Mass Spectra & Isotopes
Reading mass spectra; average atomic mass from isotopes.
🔒 All-Access
03
Electron Configuration
Aufbau, Pauli and Hund; orbital diagrams.
🔒 All-Access
04
Photoelectron Spectroscopy
Interpreting PES to map electron shells.
🔒 All-Access
05
Periodic Trends
Atomic radius, ionization energy, electronegativity.
🔒 All-Access