Name:  ________________________                        chem                                       period:  ___________
Ch. 3 & 4 atom, ionic & covalent compounds                         test      [45 points]

As stated in the course syllabus, may use your calculator and any notes written on a copy of the periodic table / equation sheet on the exam; no test correction, no make-up test.

  1.  Fill-in the below table  [15 points]

symbol

# protons

# neutrons

# electrons

charge

Atomic mass

33P -3

 

 

 

 

 

 

 

 

36

+ 2

89

 

 

9

10

 

17

 

2. Fill-in the below table [10 points]

Chemical name

Chemical formula

Iron (III) oxide

 

Sodium carbonate

 

 

Hg(OH)2

 

Si2Br7

Trinitrogen hexachloride

 

3. Identify the atom(s) and number of such atom(s) in one molecule of ___.  [10 points]

a. magnesium nitrate 

b.  calcium phosphate

4. What is an isotope ?  provide example(s) using oxygen to illustrate your answer – while such an isotope(s) do not have to actually exist, it has to be reasonable.  [10 points]