Chem30A, Sum 07, Foothill College, LecExam1                         Name___________________________________
Read questions carefully before answering. No outside paper is allowed. You can use the question paper as scratch. The last page is the periodic table. Total points = 35 x 4 = 140.

MULTIPLE CHOICES: Choose the one alternative that best completes the statement or answers the question. 

1) 

On a hot day, the thermometer read 95°F. What is the temperature in degrees Celsius?  

1) 

_________ 

A) 

77°C 

B) 

178°C 

C) 

113°C 

D) 

63°C 

E) 

35°C 

2) 

What is the mass of 53 mL of ethyl alcohol, which has a density of 0.79 g/mL?  

2) 

_________ 

A) 

41.9 g 

B) 

42 g 

C) 

67.1 g 

D) 

53 g 

E) 

67 g 

3) 

The correct answer for the addition of 7.5 g  +  2.26  g  +  1.311 g  +  2 g  is 

3) 

_________ 

A) 

10 g. 

B) 

13.1 g. 

C) 

13.071 g. 

D) 

13.0 g. 

E) 

13 g. 

4) 

The number 680,000,000 expressed correctly using scientific notation is  

4) 

_________ 

A) 

6.8. 

B) 

680 x . 

C) 

6.8 x . 

D) 

68 x  . 

E) 

0.68 x  . 

5) 

A dose of aspirin of 5.0 mg per kilogram of body weight has been prescribed to reduce the fever of an infant weighing 8.5 pounds.  The number of milligrams of aspirin that should be administered is   

5) 

_________ 

A) 

1.6 mg. 

B) 

19 mg. 

C) 

53 mg. 

D) 

0.59 mg. 

E) 

5.0 mg. 

6) 

The number of significant figures in the measurement of 45.030 mm is  

6) 

_________ 

A) 

none. 

B) 

three. 

C) 

four. 

D) 

five. 

E) 

six. 

7) 

Which of the following is NOT true for the atoms 13N, 14N, and 15N?  

7) 

_________ 

A) 

They all have 7 electrons. 

B) 

They all have the same atomic number. 

C) 

They are isotopes. 

D) 

They all have 7 protons. 

E) 

They all have the same mass number. 

8) 

The correct symbol for the isotope of potassium with 22 neutrons is 

8) 

_________ 

A) 

K. 

B) 

K. 

C) 

P. 

D) 

K. 

E) 

P. 

9) 

In an atom, the nucleus contains 

9) 

_________ 

A) 

all the protons and electrons. 

B) 

only neutrons. 

C) 

an equal number of protons and electrons. 

D) 

all the protons and neutrons. 

E) 

only protons. 

10) 

Elements in group 2 of the periodic table form ions with a charge of  

10) 

________ 

A) 

1+ . 

B) 

2+ . 

C) 

0. 

D) 

1- . 

E) 

3+. 

11) 

What element has the electron arrangement 1223? 

11) 

________ 

A) 

oxygen 

B) 

sulfur 

C) 

iron 

D) 

silicon 

E) 

carbon 

12) 

What is the symbol for the ion with 19 protons and 18 electrons? 

12) 

________ 

A) 

K+ 

B) 

F- 

C) 

Ar+ 

D) 

F+ 

E) 

K- 

13) 

Identify the metalloid in the following list. 

13) 

________ 

A) 

silver 

B) 

sulfur 

C) 

germanium 

D) 

fluorine 

E) 

copper 

14) 

In a molecule with covalent bonding, 

14) 

________ 

A) 

atoms are held together by sharing electrons. 

B) 

atoms of noble gases are held together by attractions between oppositely charged ions. 

C) 

atoms of metals form bonds to atoms of nonmetals. 

D) 

oppositely charged ions are held together by strong electrical attractions. 

E) 

atoms of different metals form bonds. 

15) 

Double and triple bonds form because 

15) 

________ 

A) 

single covalent bonds do not give all of the atoms in the molecule eight valence electrons. 

B) 

there is at least one hydrogen atom involved in the bond. 

C) 

one of the atoms in the molecule has more than 8 valence electrons. 

D) 

the atoms involved have high electronegativities. 

E) 

the ions involved have charges larger than one. 

16) 

The formula for a molecule formed from N and Cl would be  

16) 

________ 

A) 

NCl. 

B) 

. 

C) 

. 

D) 

Cl. 

E) 

. 

17) 

The correct name for the compound  is  

17) 

________ 

A) 

dinitride trioxide. 

B) 

dinitrogen trioxide. 

C) 

dinitrogen oxide. 

D) 

nitrogen trioxide. 

E) 

nitrogen oxide. 

18) 

What is the electron arrangement for aluminum?  

18) 

________ 

A) 

12233 

B) 

12233 

C) 

12233 

D) 

12233 

E) 

12233 

19) 

The __________ have the most negative electron affinities. 

19) 

________ 

A) 

chalcogens 

B) 

alkaline earth metals 

C) 

transition metals 

D) 

alkali metals 

E) 

halogens 

20) 

The ionization energies of the elements __________ as you go from left to right across a period of the periodic table, and electron affinity  __________ as you go from the left to right across a period in the table. 

20) 

________ 

A) 

increase, decrease 

B) 

decrease, increase 

C) 

decrease, decrease 

D) 

increase, increase 

E) 

are completely unpredictable 

TRUE/FALSE.  Circle 'A' if the statement is true and 'B' if the statement is false. 

21) 

Carbon has six valence electrons. 

21) 

________ 

22) 

Radon is a metal. 

22) 

________ 

23) 

Sulfur is a non-metal. 

23) 

________ 

24) 

Iodine is a metal. 

24) 

________ 

MATCHING.  Choose the item in column 2 that best matches each item in column 1. 

Match the correct name of the polyatomic ions with the formulas given. 

25) 

A) 

bisulfate 

25) 

________ 

B) 

26) 

bisulfite 

26) 

________ 

 

C) 

hydroxide 

27) 

 

27) 

________ 

D) 

oxide 

 

E) 

sulfite 

Give the correct valence for ions of the following elements. 

28) 

K 

A) 

1+ 

28) 

________ 

29) 

O 

B) 

0 

29) 

________ 

30) 

Cl 

C) 

2- 

30) 

________ 

31) 

Ca 

D) 

1- 

31) 

________ 

E) 

2+ 

Indicate the type of bonding you would expect between the following elements. 

32) 

H and F 

A) 

covalent 

32) 

________ 

33) 

F and F 

B) 

ionic 

33) 

________ 

34) 

Na and F 

C) 

none 

34) 

________ 

35) 

He and F 

35) 

________ 

 

1) 

E 

2) 

B 

3) 

E 

4) 

C 

5) 

B 

6) 

D 

7) 

E 

8) 

B 

9) 

D 

10) 

B 

11) 

D 

12) 

A 

13) 

C 

14) 

A 

15) 

A 

16) 

B 

17) 

B 

18) 

B 

19) 

E 

20) 

D 

21) 

FALSE 

22) 

FALSE 

23) 

TRUE 

24) 

FALSE 

25) 

A 

26) 

C 

27) 

E 

28) 

A 

29) 

C 

30) 

D 

31) 

E 

32) 

A 

33) 

A 

34) 

B 

35) 

C