Dr. Herrick's CH222
Pressure Quiz 1

     

 
   

Periodic trends and bond models
Copyright D. Herrick
 

20 Questions from past exams.
Practice for speed.  Aim for 2 minutes per problem.

  
 

  
1. Which of these atoms has the largest radius?
A)  S   B)  F  C)  Cl D)  O E)  Ne

   

2. Which of these atoms has the largest ionization energy?
A)  S B)  F C)  Cl D)  O E)  Ne

  
3. Which of these atoms has the smallest radius? 
A)  Na B)  Mg C)  K D)  Ca E)  Ba

  

4. The electron configuration of the ion O2- is
A)  1s2 2p6
B)  1s2 2s2 2p4
C)  1s2 2s2 2p6 3s2
D)  1s2 2s2 2p6  
E)  1s2 2p6 3s2

  
5. Which ion has the largest radius?    
A)  Cl-   B)  S2- C)  P3-     D)  Al3+ E)  Mg2+
     
6. Atoms in Group 7A have the valence configuration
A)  -ns2 np7
B)  -ns2 np5 
C)  -ns2 np3
D)  -ns2 np2
E)  -ns2 np6

7. Which of these atoms has the largest radius? 
A)  Mg   B)  Cs    C)  Na  D)  K  E)  Ba   

     

8. The total number of electrons in the ion Al3+ is
A)  10   B)  12 C)  13  D)  15 E)  16 
 
9.

Which atom has the largest ionization energy?
A)  K B)  Cs   C)  I D)  Ba E)  Cl   

      
           

10.

Which bond is expected to have the highest ionic character?
A)  Cl-F B)  I-F    C)  Br-F  D)  F-F 

           
11. Which is expected to have the highest degree of metallic bonding?
A)  Si(s) B)  Ba(s)   C)  S(s) D)  Ca(s)
 
12.

Which pair is least likely to form an ionic bond?
A)  Na and S B)  Br and Mg C)  N and C      D)  O and Cs 

13.

The best description of the bonding between nitrogen and phosphorous atoms is 
A)  ionic
B)  covalent
C)  polar covalent with the negative partial charge on N  
D)  polar covalent with the negative partial charge on P
E)  metallic

          

14.

Which bond has the highest degree of covalent character?  
A)  Cl-P  B)  Cl-S   C)  Cl-Si D)  Cl-Mg

     

15.

Which solid has the least metallic bonding character?
A)  K B)  Mg   C)  Na D)  Al  

     

16.

Which ionic solid has the largest lattice energy?
A)   LiF    B)   NaBr C)   CsCl   D)  KI  

       

17.

The correct order of increasing (smaller < larger) ionic radii is:
A) Cl-  <  S2-  <  K+  <  Ca2+
B) K+ <  Ca2+ < Cl-  <  S2-  
C) S2-  <  Cl-  <  K+  <  Ca2+
D) Ca2+ <  K+ <  Cl-  <  S2-  
E) Ca2+ <  K+ <  S2-   <  Cl- 

    

18. Use the bond energies for H2 (436 kJ), Cl2 (242 kJ) and HCl (431 kJ) to estimate the enthalpy change in kJ for the reaction 

     H + Cl2    HCl + Cl
    
A) -152  B)  -189   C) 206 D) +189 E) 152

         

19.

Which ionic solid has the largest lattice energy?

A)  KCl  

 B)  KI C)  CsCl D)  CsI  

     

20. Use the data (kJ) for ionization energies, electron affinities and heats of formation to find the lattice energy of Fe3O2(s) according to the equation

      Fe2O3(s)     2Fe3+(g)  + 3O2-(g) 

 IE1(Fe) = 762 EA1(O) = -141 DHf (Fe2O3(s)) = -826
 IE2(Fe) = 1562 EA2(O) =  746 DHf (Fe(g)) =  416
 IE3(Fe) = 2957 DHf (O(g)) =  249

A) 12571

 B) 15604  C) 9332 D) 14782   E) 13854

        

   

 

    

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   Copyright D. Herrick