Prepare for AP Chemistry Topic 1.8 with this free practice quiz. Test your understanding of valence electrons, ionic charges, and chemical formulas to maximize your AP score. Why Atoms Form Ions At All An atom’s chemistry is run by its valence electrons, and the most stable arrangement an atom can reach is a full outer … Read more
Master AP Chemistry Topic 1.6 with our PES practice quiz. Practice interpreting photoelectron spectroscopy graphs and understanding binding energy to ace your AP Chemistry exam. What a Photoelectron Spectrum Is Photoelectron spectroscopy, PES, is an experimental technique that reads an element’s electron configuration directly. A sample is hit with high energy photons, and the photons … Read more
Boost your AP Chemistry score with this Topic 1.4 practice quiz. Test your understanding of mixture composition, mass percent, and elemental analysis for exam success. Mixtures Are Not Compounds A pure substance has a fixed composition. Water is always 11.2% hydrogen by mass, and calcium carbonate is always 40.0% calcium, because their formulas fix the … Read more
Prepare for AP Chemistry Topic 1.3 with this practice quiz. Challenge yourself on percent composition, empirical formulas, and molecular formulas to boost your AP score. What Percent Composition Tells You The percent composition of a compound is the percentage of its total mass that comes from each element. It is a property of the compound … Read more
Ace AP Chemistry Topic 1.2 with this mass spectrometry practice quiz. Test your ability to analyze mass spectra and calculate average atomic mass for the AP exam. What a Mass Spectrum Shows A mass spectrometer sorts the atoms of a sample by mass. The sample is vaporized and ionized, the ions are accelerated, and they … Read more
Ace AP Chemistry Topic 1.7 with this periodic trends practice quiz. Test your knowledge of atomic radius, ionization energy, and Coulomb’s law to prepare for test day. The One Idea Behind Every Trend Almost every periodic trend is Coulomb’s law wearing different clothes. The attraction between a nucleus and an electron grows with the charges … Read more
Master AP Chemistry Topic 1.1 with this free practice quiz. Test your skills on moles, molar mass conversions, and dimensional analysis to prepare for your AP exam. The Mole: Counting Particles You Cannot See Atoms and molecules are far too small to count one by one, yet chemistry constantly needs to know how many of … Read more
How well can you apply electron configuration rules? Work through 20 AP Chemistry-style practice questions covering orbitals, ions, valence electrons, and electron filling. Shells, Subshells and Orbitals The electrons in an atom occupy orbitals, and each orbital holds at most two electrons. Orbitals are grouped into subshells, and subshells into shells labelled by the principal … Read more