1. Sem 1 09-10 Final Review Regular Chem

2. 1
When elements combine to form substances consisting of two or more different atoms

3. 1a
chemical compounds

4. 2
H2SO4
How many different elements?

5. 2a 3

6. 3
H2SO4
How many total atoms of elements?

7. 3a 7

8. 4
1st energy level holds ? e-
2nd holds ? e-

9. 4a 2 8

10. 5
Charged particles are called ?

11. 5a
Ions -

12. 6
Bonds that share electrons are called ?

13. 6a
Covalent Bonds

14. 7
The elements or compounds that enter the reaction are called -

15. 7a
Reactants

16. 8
Elements or compounds produced in a chemical reaction are called -

17. 8a
Products

18. 9
reactants > products
What does the arrow mean?

19. 9a
To make or to yield

20. 10
Balance
H2 + O > H2O
Write the sum of the coefficients

21. 10a
2 H2 + O > 2 H2O
Sum of coefficients is 5 (2+1+2)

22. Fe2O3 + CO -----> Fe3O4 + CO211
Balance
Fe2O3 + CO > Fe3O4 + CO2
Find the sum of coefficients

23. 3 Fe2O3 + CO -----> 2 Fe3O4 + CO2
11a
3 Fe2O3 + CO > 2 Fe3O4 + CO2
Sum of coefficients is 7 ( )

24. Hydrogen and chlorine react to produce hydrochloric acid12
Hydrogen and chlorine react to produce hydrochloric acid
Change to a balanced equation
(remember boot elements are diatomic)

25. 12a
H Cl > 2HCl

26. 13
What type of reaction is this?

27. 13a
Combination/synthesis

28. 14
Type of reaction

29. 14a
decomposition

30. 15
Zinc plus iodine makes zinciodide
Write the balanced equation

31. 15a
Zn + I2  ZnI2

32. 16
Write the balanced equation for the decomposition of water

33. 16a
2 H2O  2 H2 + O2

34. 17
Write the single displacement reaction that makes sodium hydroxide and a gas from sodium and water

35. 17a
2 Na H2O  2 NaOH H2

36. 18
Sr2+ has how many protons, neutrons and electrons?

37. 18a
38 protons, 50 neutrons, and 36 electrons.

38. 19
A certain metallic element forms a compound with chlorine, having the general formula XCl2. The X ion in this compound has 28 electrons. What is element X

39. 19a Zn

40. 20
Elements belonging to which group of the periodic table form ions with a 2+ charge?

41. 20a
Alkaline Earth Metals

42. 21
An ion with a positive charge is called a ___________;a negatively charged ion is called an___________

43. 21a
cation (pronounced CAT-ion);
anion (AN-ion).

44. 22
Give the complete chemical symbols for the following ions: (a) The ion with 26 protons, 30 neutrons, and 24 electrons; (b) the phosphorus ion with 16 neutrons and 18 electrons.

45. 22a
(a) The element whose atoms have 26 protons (atomic # 26) is Fe (iron). The mass number of this isotope is = 56 (the sum of the protons and neutrons). Because the ion has two more protons than electrons, it has a net charge of 2+. Thus, the complete symbol for the ion is
56Fe2+
(b) By referring to a periodic table or table of elements, we see that phosphorus (symbol P) has an atomic number of 15. Thus, each atom has 15 protons. The mass number of the ion is = 31. Because the ion has 15 protons and 18 electrons (three more electrons than protons), its net charge is 3-. Thus, the complete symbol for the ion is
31P3-

46. 23
polyatomic ions are
(give an example as well as a definiton)

47. 23a
These ions consist of atoms joined as in a molecule, but they have a net positive or negative charge
Ex: NO3– (nitrate ion) & SO42– (sulfate ion).

48. 24
atoms gain or lose electrons so as to end up with the same number of electrons as

49. 24a
the noble gases

50. 25
Predict the charges expected for the most stable ions of barium and oxygen.

51. 25a
Ba 2+ cation.
O 2- anion

52. 26
Predict the charge of the most stable ion of aluminum

53. 26a
Al 3+

54. 27
Which elements are considered diatomic list them

55. 27a
Boot elements H2 N2 O2 F2
Cl2
Br2 I2 At

56. 28
Which of the following compounds would you expect to be ionic: N2O, Na2O, CaCl2, SF4?

57. 28a
We would predict that the ionic compounds are Na2O and CaCl2 because they are composed of a metal combined with a nonmetal. The other two compounds, composed entirely of nonmetals, are molecular.

58. 29
Which of the following compounds are molecular: CCI4, FeS, P4O6, PbF2?

59. 29a CCI4 and P4O6 These are non-metals.
FeS has an electronegativity difference that puts it in the polar covalent range.

60. 30 What are the empirical formulas of the compounds formed by
(a) Al 3+ and Cl – ions
(b) Al 3+ and O2- ions
(c) Mg 2+ and NO3 – ions?

61. 30a
(a) Three Cl– ions are required to balance the charge of one Al3+ ion. Thus, the formula is AlCl3.
(b) Two Al3+ ions are required to balance the charge of three O2– ions (that is, the total positive charge is 6+, and the total negative charge is 6-). Thus, the formula is Al2O3.
(c) Two NO3– ions are needed to balance the charge of one Mg2+. Thus the formula is Mg(NO3)2. In this case the formula for the entire negative ion must be enclosed in parentheses so that it is clear that the subscript 2 applies to all the atoms of that ion.

62. 31
(a) Na + and PO4 3–
(b) Zn 2+ and SO4 2–
(c) Fe 3+ and CO3 2–

63. 31a
(a) Na3PO4; (b) ZnSO4; (c) Fe2(CO3)3

64. 32
How many hydrogen atoms are in CH3CH(CH3)2?

65. 32a 10

66. 33 Which of the following are ionic and which are molecular? K2O CCl4

67. 33a
All are either polar covalent (molecular) or covalent (molecular) except K2O is ionic.

68. 34 Which of the following compounds is not an ionic compound?
  NaF2  SrO  GaF3  Cs2O  CsCl

69. 34a
All are ionic

70. 35
Which of the following is incorrectly named, using the rules for binary molecular compounds?
CF4--carbon tetrafluoride 
SbCl3--antimony trichloride 
C2O5--dicarbon pentoxide 
H3As--hydrogen arsenide 
NO2--nitrogen dioxide

71. 35a
Trihydrogen arsenide would be correct

72. 36 Which of the following is named correctly?
barium chloride pentahydrate, BaCl2 6H2O 
lithium sulfate, Li2SO3 
potassium nitrate, KNO2 
sodium chlorite, NaClO

73. 36a
barium chloride pentahydrate, BaCl2 6H2O 

74. 37
Which of the following statements is incorrect? Salpeter, KNO3, is really potassium nitrate.  Milk of magnesia, Mg(OH)2, is really magnesium hydroxide.  Muriatic acid, HCI, is really hydrochloric acid.  Lime, CaO, is really calcium oxide.  Soda ash, Na2CO3, is really sodium carbonite.

75. 37a
Soda ash, Na2CO3, is really sodium carbonite

76. 38 Which of these acids has a name that begins with hydro?
HCl  HClO3  HClO2  HClO4  HClO

77. 38a
HClO

78. 39 Which name is incorrectly matched with the given formula?
SO2 : dioxygen sulfide 
P2O5 : diphosphorus pentoxide 
CO2 : carbon dioxide 
H2O : dihydrogen oxide 
NH3: nitrogen trihydride

79. 39a
SO2 : dioxygen sulfide 

80. 40
Draw the dot diagram for CH2ClF

81. 40a

82. 41
Draw the dot diagram for C2H4

83. 41a

84. 42
Draw the dot diagram for H3PO4

85. 42a

86. 43
Draw the dot diagram for SO4 2-

87. 43a 2-

88. 44
Name this compound
CCl4

89. 44a
Carbon Tetrachloride

90. 45
Name this compound
H2SO3

91. 45a
Chlorous acid