Chem homeowrk

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NAME_____________________________ WORKSHOP 6: Quantum Mechanics Section ________________ Show calculation setups and answers for all problems below. 1. An FM radio station has a frequency of 88.9 MHz (1 MHz = 106 Hz). Determine the wavelengt h (in nm). ___________________ 2. Violet light has a wavelength of about 410 nm. What is its frequency (in Hz)? ___________________ 3. An advertising sign gives off red light and green light.

A. Which light has the higher energy? Briefly explain below. ___________________

B. One of the colors has a wavelength of 680 nm, and the other has a wavelength of 500 nm. Identify which color has which wavelength. Explain your identifications below.

Red =______________ Green =____________

C. Which light has the higher frequency? Briefly explain below. ___________________ 4. Write the symbols for three cations and three anions isoelectronic with neon: ________ ________ ________ ________ ________ ________

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5. Write complete and abbreviated electron configurations for each of the following atoms/ions:

A. S Complete: _______________________________________________ Abbreviated: _____________________________________________

B. Nb Complete: _______________________________________________ Abbreviated: _____________________________________________

C. Sb+ Complete: _______________________________________________ Abbreviated: _____________________________________________ 6. Arrange the following forms of electromagnetic radiation in order of increasing energy:

A. gamma rays from a supernova B. infrared rays from a hot plate C. ultraviolet light from the sun D. radiowaves from an MP3 player E. green light from chlorophyll

__________________________ 7. Complete the orbital energy diagram below for Co. How many unpaired electrons does the Co atom have? __ __ __ __ __ 3d __ 4s __ __ __ 3p __ 3s __ __ __ 2p __ 2s __ 1s # unpaired electrons ________

E n e r g y