Ch. 3 & 4 atom & molecules  test                                70 points                                                          chemistry

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

symbol

# protons

# neutrons

# electrons

charge

Atomic mass

33P -3

 

 

 

 

 

 

 

 

36

+ 2

89

 

 

9

10

 

17

2. Describe the Bohr model of an atom.  [5 points]

 

3. Identify by name (not symbol) the atoms and the number of each atom in the following compounds.  [18 points]


a.  CH3 (CH2 )4 CH2 OH:  _______________________________________
b.  Pb(NO3 )2 :  _______________________________________________
c.  (NH4 )2 S:  __________________________________________________


4. Write the chemical formula of the following ionic compounds containing: [12 points]

a. calcium & iodine

b. K & OH [charge of ions are not shown – you have to determine its charge]

c. Fe 3+& S [charge of S is not shown – you have to determine its charge]

5. fill-in the below table  [20 points]

chemical formula

chemical name

 

lead (IV) hydroxide

 

aluminum carbonate

 

calcium phosphate

 

trisilicon hexaoxide

K2S

 

Mg(OH)2

 

ZnSO4

 

N2O5

 

SO2

 

PCl3