Chemistry Questions

Name ___________________OCC 121 Unit 7-10 Exam
1) Give the following configurations of the element with the atomic number of your birthday. For
example, I was born on the 26th of the month so I would give the configuration of element 26.
a. What is the date of your Birthday (I would put 26) ___________________
b. Element name ___________________
c. Electron Configuration _______________________________
d. Noble Gas configuration (abbreviated configuration) __________________
e. Orbital Configuration
2) Choose the Group 17 element that is closest to your birthday. Describe in words the changes that
occur when it become an ion. Be specific.
a. Give the full electron configuration of the ion ____________________________
3) Find an exception to the aufbau principle of electron filling and configuration and explain how
thie example violates the aufbau principle and why this exception makes sense.
4) Find the emission spectrum for an element of your choice other than hydrogen.
a. Insert or include the picture
b. Explain what in an atom causes the lines in the spectrum. Be specific about the energy
levels and electrons. Include a drawing if it will help your explanation. If there is more
than one spectral line, how is that possible?
5) Explain the differences between each of the atomic models we have looked at (Dalton,
Thomson, Rutherford, Bohr, Quantum). Describe the ideas that changed with each model in a
sequence from oldest to newest model.
6) Explain the orbitals that are described by Schrodinger’s wave equation (and what the shapes
indicate). What exactly is an orbital?
7) Draw the electron dot structure for C2H3Cl.
a. Write a step by step description of how you would instruct someone to draw the dot
structure for this molecule (“look at Google” is not an appropriate answer).
b. Put the molecule into (from the lab) by putting the formula into the
“name” window. Show and explain the molecule’s polarity in both pictures and words.
c. What is the bond order of the carbon – carbon bond? __________
d. Explain how coulombic attractions hold the carbons together.
8) Look at the molecules with 4 electron groups in Table 11.1 in your eText (at the end of section
11.3 of the eText). Describe the differences and similarities in molecular geometry, bond angle,
hybridization, and structure for the geometries of these molecules. Explain why these similarities
and differences exist.
9) Show O2 according to Lewis theory and the valence bond model. Describe the diagrams in terms
of bond types and hybridization.

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