CHEM2004                                                               Name_________________________

Exam 1                                                                      Fall 2009

 

1.         Match the formula with the name (10 points)

 

_____ phosphate	a) HCOO-	b) SO42-
_____ ammonium	c) SO32-	d) P 3-
_____ carbonate	e) NH3	f) OH-
_____ oxalate	g) CN-	h) NO2-
_____ sulfite	i) CH3COO-	k) CO32-
_____ nitrate	m) SO42-	o) NO3-
_____ hydroxide	p) PO43-	r)  S2-
_____ formate	s) N3-	t) C2O42-
_____ cyanate	u) NH4+	x)  OCN-
_____ sulfide

                                   

2.         For the two elements below, list (A) the minimum oxidation number, (B) maximum oxidation number and (C) the common (+) oxidation number.             (6 points)

(A)	(B)	(C)
Se -
Co -

 

 3.         Write the complete electronic configuration for each of the following:   (10 points)

       a)  B

 

b)  Pm

 

c)  Pb

 

d)  Cr

 

e)  Ni⁺²

 

4.         Give the number of valence electrons for each of the following:   (5 points)

 

a)  B

 

b)  Pm

 

c)  Pb

 

d)  Cr

 

e)  Se

 

5.         Classify each of the following elements as Representative, Transition, Inner Transition or Noble Gas.   (10 points)

 

a)  Co  ________________________

 

b)  Ho  ________________________

 

c)  Al __________________________

 

d) Be  __________________________

 

e) Rn __________________________

  

6.         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) gases                                                                     ______

 

d) aluminum                                                              ______

 

e) Group VB                                                             ______

 

f) malleable                                                               ______

 

g) tend to lose electrons                                           ______

 

h) brittle as solids                                                     ______ 

 

i) hydrogen                                                                ______

 

j) inner transition elements                                      ______

  

7.         Circle the correct answer for each of the following questions.

(20 points)

 

a)  The element with the largest size:	C  or Si
b)  The ion with the largest size:	Se+4  or Se+6
c)  The element with the largest atomic radii:	Cr or Co
d)  The element with the largest atomic radii:	Li or Ne
e)  The one with the largest radius:	C or C+4
f)  The element with the largest ionization energy:	Li or K
g) The element with the largest ionization energy:	K or  As
h) The element with the largest electronegativity:	Li or Fr
i) The element with the largest electronegativity:	C or O
j) The element with the largest electronegativity:	O or Se

 

8.         Complete the equilibrium and write the K_sp expression for each of the following:          (12 points)

 

a) Ca₃(PO₄)₂  (s)   n

 

             k_sp =

 

b) Al(OH)₃  (s)  n

 

             k_sp =

 

9.         List the five types of atomic radii.  (5 points)

 

 

 

10.       For  a spontaneous reaction that gives off heat and has an increase in disorder, what are the signs for the 3 thermodynamic properties?  (6        points)

 

             DG                  _________________

 

             DH                  _________________

 

             DS                   _________________

 

 

11.       Fill in the blank (6 points)

 

            Name for the Group VIIA elements ______________________________

 

            Another name for the d-block elements __________________________

 

            Lanthanides are also called  ___________________________________

 

            The second and third row transition elements have approximately the same atomic radii.  This is due to the _________________________________

 

            List two gases that exist as diatomics  _____________, _____________