Unit 4 Electrons Study Guide Name _________________________________ Date _____________________ What are the three rules for electron configurations? Explain their meanings. (You will have to determine which rule is not being followed in examples on the test) Orbital shapes

s p d f Number of blanks for configuration

Total # of electrons that can fit

For each of the following elements, draw out the electron configuration (arrows), write the long-hand configurations, and write out the short-hand configurations. Sodium Iron Bromine

Barium Neptunium Cobalt Silver Radium

What is the wavelength of a wave having a frequency of 3.76 x 1014 Hz? What is the frequency of a 6.9 x 10-13 m wave? What is the wavelength of a 1.28 x 1017 Hz wave? What is the frequency of a 7.43 x 10-5 m wave? What is the frequency of a 2,600 cm wave? What is the energy of a 7.66 x 1014 Hz wave? What is the frequency of a wave carrying 8.35 x 10-18 J of energy?

What is the frequency of a 1.78 x 10-15 J wave? What is the frequency of a 1.31 x 10-22 J wave? What is its wavelength? What is the wavelength of a 7.65 x 10-17 J wave? What is the wavelength of a 1.528 x 10-13 J wave?

Using the EM Spectrum below, describe the trend in wave length, frequency, and energy as you go from left to right.

Fireworks produce a specific color depending on the element it contains. Explain what is happening to produce this color. Be specific! Discuss what is happening to the electrons and why.