Chemistry 100                                                                                     Dunnivant

Exam 1                                                                                                Spring, 2006

 

Name (printed)  _____________________

 

Closed notes, closed book, closed Internet, closed neighbor!

 

I have neither given nor received aid on this exam.  __________________________

                                                                                                Signature

 

 

 

  1. (5 pts)  List four examples of physical properties.

 

 

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What makes a property a chemical property (or how is it not a physical property)?

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

  1. (10 pts)  What makes a scientific theory different from the publicÕs idea of a ÒtheoryÓ? (a.k.a. why should we be offended when Joe or Jane Public say Òoh, itÕs just one of these scientistÕs theories.Ó)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

  1. (5 pts)  Water has many unique chemical and physical properties.  What molecular property is responsible for this phenomenon?

 

 

 

 

 

 

  1. (3.33 pts each)  Explain the difference between

 

a homogeneous and heterogeneous solution

 

 

 

 

 

 

 

a molecule and a compound

 

 

 

 

 

 

 

 

an atom and an element

 

 

  1. (2 pts each)  Give the explanation and scientist for each of the following (you may be brief but complete)

 

How do we know that electrons exist?           

 

 

 

 

 

 

 

How do we know that some atoms undergo radioactive decay?

 

 

 

 

 

 

 

How do we know the shapes of electron orbitals?

 

 

 

 

 

 

 

What is the origin of conservation of mass (there are two scientist involved in this)

 

 

 

 

 

 

How do we know that atoms are empty fuzzy balls?

 

 

 

 

 

 

 

 

 

 

  1. (1 pt each)  Give an example of two chemicals (formula or chemical name) that interactive with each other by the following intermolecular forces:

 

ion-dipole

 

 

dipole-dipole

 

 

hydrogen bonding

 

 

induced dipole-dipole

 

 

induced dipole-induced depole

 

 

 

  1. (5 pts)  YouÕre going to Australia, the land of the Celsius temperature scale.  The weather channel says it will be 50 degrees C in Perth.  What will the temperature be in degrees F?

 

 

 

 

 

 

 

 

  1. (10 pts)  Give the spectroscopic notation for:

 

Fe              __________________________________________ (3 pts)

 

U               __________________________________________ (3 pts)

 

What are the location of U valence electrons?

                  __________________________ (4 pts)

 

 

  1. (2 pts each) Give the name or the chemical formula for the following:

 

Na                                     ________________________

 

Cobalt                                ________________________

 

Cadmium                           ________________________

 

Sulfite ion                          ________________________

 

NO3-                                  ________________________

 

Potassium di-hydrogen phosphate            ________________________

 

Bicarbonate ion                 ________________________

 

KNO2                                ________________________

 

Sodium cyanide                 ________________________

 

Acetic acid             ________________________

 

 

 

  1. (5 pts each) Draw the Lewis dot structure and give the molecular and electronic geometry for

 

 

NO3-

 

 

 

 

 

 

 

NO2

 

 

 

 

 

 

C5H12 (pick any central carbon atom for geometry names)