Arkansas State University  Department of Chemistry and Physics
CHEM1003	Exam 2

Exam 2                                                                             Name_________________________
CHEM1003                                                                     Spring 1996

1. Define each of the following as either a homogeneous (H) or heterogeneous (T) mixture. (5 points)

A solution of KI in water       ______

Sand and gravel                     ______

Shovel full of dirt                    ______

Oil and water                          ______

Spaghetti with meatballs        ______

2. Fill in the blanks. (1 point each)

Column in Periodic Table is a group or ______________________

Row in Periodic Table ______________________

Another name for Group IIA _______________________

Another name for Group VIIIA _______________________

The atomic masses of the Periodic Table are based on what isotope? _________________________

List the two elements that are liquids at room temperature
_______________ and ______________

The identity of an element depends on the number of ____________

Who discovered protons ________________________

What is the charge on the neutron ________________________

Who discovered the nucleus ______________________

Millikan determined the _______________________ and _______________ of an electron

Atoms with the same atomic number but differing atomic mass are called ___________________

A chemical combination of two or more elements in a definite proportion is called a ______________________________

3. Several of the elements exist in nature as diatomics. Define diatomic and give three examples with the correct formulas. (10 points)
 
 
 
 
 
 

4. Classify each of the following elements as Representative, Transition, Inner Transition or Noble Gas. (5 points)

a) Ce

b) Ho

c) At

d) As

e) He

5. Fill in the missing information. (20 points)
 

Name	symbol	atomic number	atomic mass	protons	neutrons	electrons
tin
zinc	Zn
boron	B
cesium	Cs		132.91

6. List the three parts of a chemical equation. (5 points)
 
 
 
 

7. Listed below are descriptions of either metals or nonmetals. Match A for metals and T for nonmetals. (10 points)

a) noble gases ______

b) ductile ______

c) brittle solids ______

d) strontium ______

e) halogens ______

f) nonmalleable ______

g) tend to gain electrons ______

h) opaque as thin sheets ______

i) hydrogen ______

j) transition elements ______

8. Name the following ions: (1 point each)

a) CN^- _______________________________
 

b) CO₃^2- _______________________________
 

c) SO₄^2- _______________________________
 

d) PO₄^3- _______________________________
 

e) MnO₄^- _______________________________
 

9. Give the formula and the correct charge for each of the following: (1 point each)

a) perchlorate __________________________

b) sulfide __________________________

c) nitrate __________________________

d) dichromate __________________________

e) hydroxide __________________________

10. Name each of the following: (10 points)

a) CCl₄ -

b) Ag₂SO₃ -

c) P₄O₁₀ -

d) CaO -

e) NH₄F -

f) CrI₃ -

g) ZnF₂ -

h) NH₃ -

i) SO₃ -

j) FeCl₂•2H₂O -

11. Give the formula for each of the following: (10 points)

cobalt(II) chloride -

beryllium(II) oxide -

arsenic trichloride -

magnesium chloride -

chromium(III) oxide -

tetrasulfur triphosphide -

gold(III) cyanide -

manganese(II) sulfate -

cupric carbonate -

calcium nitrite -