CHEM 31X Study Guide - Midterm Guide: Ionic Bonding, Bond Length, Formal Charge

• School: Stanford University
• Department: Chemistry
• Course: CHEM 31X
• Professor: Coxand Zare

Document Summary

Midterm prep: quantum theory describes distribution of electrons, blackbody radiation = matter emits electromagnetic radiation when heated b. i. Radiation depends only on temperature and not composition b. ii: previously thought that c. i. intensity of light would increase throughout uv region c. i. 1. Matter does not interact continuously and equally with all wavelengths of light c. i. 1. a. Light-matter interactions are discrete; matter only absorbs and emits specific wavelengths of light, specific packets of energy (quanta) c. i. 1. a. i. Energy associated with quantum of radiation is proportional to frequency of emitted radiation. Atoms in gas phase absorb/emit discrete wavelengths of light a. i. 1. a. i. Absorption = light source to sample to prism to detector a. i. 1. a. ii. Emission = light source to sample c. i. 1. b. energies of electrons are restricted to discrete values that are c. ii. Also found that characteristic of the atom c. ii. 1. particles can display wavelike behavior and waves can display: first ionization energy particle like behavior a. Ionization energy = minimum energy required to remove electron from gaseous atom/ion.