Chemistry 110

Study Guide

6-9

Chapter 6

Know how a wavelength (lambda, λ) is defined (distance from peak to peak of a wave). Know that frequency (nu, ν) is wavelengths/sec. λν =c, where c is the velocity of light. Lambda and nu are inversely proportional.

Know that a photon is an energy package (particle) with E=hv…A photon of high frequency light has higher energy than a photon of lower frequency light.

Know the order of increasing frequency of electromagnetic radiation.

Radio<microwave<infrared<red visible, blue visible<ultraviolet<x-ray>gamma ray

Know what the emission line spectrum is. Know how Bohr’s quantum model of the atom explains the emission line spectrum.

Know about quantum numbers: principal quantum numbers, subshells, orbitals, spin (magnetic).

Be bale to explain why the higher the principal quantum number the greater the number of electrons allowed. Why are there only 2 electrons in the first principal shell and 8 electrons in the second shell?

Be able to write electron configurations for elements.

Be able to draw geometrical diagrams of s and p orbitals. Know the spatial arrangement of the three p orbitals (perpendicular).

Be able to define an orbital. Know that electrons do not travel in an orbital path.

Know what the two electrons in an orbital must have opposite spins.

Be able to use orbital diagrams to show how the orbitals are filled with electrons.

Know that ferromagnetism is due to several unpaired electrons in d orbitals.

Be able to draw a periodic table, showing where the s, p. d, and f subshells are filled.

Problems: 6.65-6.69, 6.72b, 6.89.