Chem 101 Exam Paper 3

Please show all steps.

 

  1. The wavelength of the green light from a traffic signal is centered at 522 nm. What is the frequency of radiation? – 5 pts

 

  1. Calculate the energy (in joules) of a photon of wavelength 5.00 X 104 nm (infrared region). – 5 pts

 

  1. The fastest serve in tennis is about 140 miles per hour, or 62 m/s.  Calculate the wavelength associated with a 6.0 X 10-2 kg tennis ball traveling at this speed. – 5 pts
  2. List the values of n, l, ml for orbitals in the 4d subshell. – 5 pts
  3. Define the Pauli Exclusion Principle and Hund’s Rules. – 5 pts
  4. Determine the number of unpaired electrons in an atom of tellurium, Te. – 5 pts
  5. Arrange the following in order of increasing atomic radii.  Justify your order. – 5 pts  Cs, F, K, Cl
  6. Arrange the following in order of increasing first ionization energy.  Justify your order. – 5 pts  Na, Mg, Al, Si
  7. Arrange the following ions in the order of increasing ionic radii: - 10 pts

(a)    Ca2+, K+, Al3+

(b)   Se2-, Br-, Te2-

  1. Predict the products in the following reactions.  Write a balanced equation in each case. -  10 pts

 

(a)    H2(g)     +       I2(g)   

 

(b)    NaH(s)    +    H2O(l)

 

  1. Draw dot and cross diagrams for the reaction between Al and F. – 10 pts

 

  1. Write the Lewis structures for methane, magnesium chloride, carbon dioxide and nitrogen.  For each, describe the bonding and properties. – 20 pts

 

  1. Draw the Lewis structure for ICl4-. – 10 pts

Bonus Question – 5 pts

 

Write the electronic configuration for Ru2+.