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AP Chemistry 1.8: Valence Electrons and Ionic Compounds

Practice AP Chemistry 1.8 questions on valence electrons, periodic reactivity, typical ionic charges, Coulombic attraction, and ionic formulas.

Syllabus
Effective Fall 2025
Course
AP Chemistry

Exam points

  • Use quantum models and electron configurations to explain atomic structure, spectra, and energy-level transitions.
  • Interpret photoelectron, emission-spectrum, and orbital data to infer electron arrangements and element identity.

Covered syllabus points

1.8.A—Explain the relationship between trends in the reactivity of elements and periodicity

1.8 Valence Electrons and Ionic Compounds question 1

[Maximum number: 1]

Some binary compounds that form between fluorine and various nonmetals are listed in the table above. A student examines the data in the table and poses the following hypothesis: the number of F atoms that will bond to a nonmetal is always equal to 8 minus the number of valence electrons in the nonmetal atom.

Based on the student's hypothesis, what should be the formula of the compound that forms between chlorine and fluorine?

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