1. FORMULAS to NAMES IONIC and MOLECULAR
Inside there are 50 chances for you to look at a formula and determine the proper or stock name of the compound.
You are asked each time to first decide if it’s IONIC or MOLECULAR.
You can tell if the 1st atom or part is a METAL, that’s ionic.
If the 1st atom or part is a NONMETAL, then that’s is molecular.
The only exception is when you see AMMONIUM, which starts with an N for nitrogen, but NH4+1 is a polyatomic cation, so those are ionic after all.

2. I suggest getting a piece of paper, and numbering 1-50 and doing them all. You might need to do some now, some later, and some again.
Once you grade them, CORRECT YOURSELF in RED, that makes you really feel the sting of booboos. All mistakes, however small should be redone.
If you can’t get through them all error free, study more. Ask your teacher what’s up with things, learn the rules for naming.
You can do this without paper, but when you do it in your head, you are going to be too nice to yourself. You should be able to write it exactly correct, not “almost right but I won’t forget it next time so I will take a point now anyway” correct. Exactly correct is the standard.

3. MgO
What is the name of this compound?
Is it ionic or molecular?

4. MgO Magnesium Oxide THINK: Mg is a metal, this is an ionic compound
Mg makes a +2 cation Mg+2 O makes a -2 anion O-2
Mg O-2
2:2 ratio becomes 1:1
Magnesium Oxide

5. TaF5
What is the name of this compound?
Is it ionic or molecular?

6. TaF5 Tantalum fluoride (no RN, only 1 kind of cation)
THINK: Ta is a metal, this is an ionic compound
Ta makes a +5 cation Ta+5 F makes a -1 anion F-1
Ta+5 F-1
1:5 ratio
Tantalum fluoride (no RN, only 1 kind of cation)

7. SrCl2
What is the name of this compound?
Is it ionic or molecular?

8. SrCl2 Strontium chloride
THINK: Sr is a metal, this is an ionic compound
Sr makes a +2 cation Sr+2 Cl makes a -1 anion Cl-1
Sr+2 Cl-1
1:2 ratio
Strontium chloride

9. NiBr3
What is the name of this compound?
Is it ionic or molecular?

10. NiBr3 Nickel III Bromide
THINK: Ni is a transitional metal, this is an ionic compound
Ni makes a +3 cation here Ni+3 Br makes a -1 anion Br-1
Ni+3 Cl-1
1:3 ratio
Nickel III Bromide

11. CH4
What is the name of this compound?
Is it ionic or molecular?

12. CH4 Carbon tetrahydride (AKA methane)
THINK: C is a nonmetal, this is an molecular compound
Use the prefix naming system
1:4 ratio
Carbon tetrahydride
(AKA methane)

13. TiO2
What is the name of this compound?
Is it ionic or molecular?

14. TiO2
THINK: Ti is a transitional metal, this is an ionic compound
Ti makes a +4 cation here Ti+4 O makes a -2 anion O-2
Ti+4 O-2
The 2:4 ratio becomes 1:2
Titanium IV oxide

15. NO2
What is the name of this compound?
Is it ionic or molecular?

16. NO2
THINK: N is a nonmetal, this is an molecular compound
Use the prefix naming system
1:2 ratio
Nitrogen dioxide

17. Ti2O3
What is the name of this compound?
Is it ionic or molecular?

18. Ti2O3
THINK: Ti is a transitional metal, this is an ionic compound
Ti makes a +3 cation here Ti+3 O makes a -2 anion O-2
Ti+3 O-2
2:3 ratio
Titanium III oxide

19. TiO
What is the name of this compound?
Is it ionic or molecular?

20. TiO
THINK: Ti is a transitional metal, this is an ionic compound
Ti makes a +2 cation here Ti+2 O makes a -2 anion O-2
Ti+2 O-2
1:1 ratio
Titanium II oxide

21. AlN
What is the name of this compound?
Is it ionic or molecular?

22. AlN Aluminum nitride THINK: Al is a metal, this is an ionic compound
Al makes a +3 cation here Al+3 N makes a -3 anion N-3
Al+3 N-3
The 3:3 ratio becomes a 1:1 ratio
Aluminum nitride

23. PCl3
What is the name of this compound?
Is it ionic or molecular?

24. PCl3 Phosphorous trichloride
THINK: P is a nonmetal, this is an molecular compound
Use the prefix naming system
1:3 ratio
Phosphorous trichloride

25. BF3
What is the name of this compound?
Is it ionic or molecular?

26. BF3 Boron trifluoride (rhymes with…)
THINK: B is a nonmetal, this is an molecular compound
Use the prefix naming system
1:3 ratio
Boron trifluoride
(rhymes with…)

27. CF4
What is the name of this compound?
Is it ionic or molecular?

28. CF4 Carbon tetrafluoride
THINK: C is a nonmetal, this is an molecular compound
Use the prefix naming system
1:4 ratio
Carbon tetrafluoride

29. N2O3
What is the name of this compound?
Is it ionic or molecular?

30. N2O3 Dinitrogen trioxide
THINK: N is a nonmetal, this is an molecular compound
Use the prefix naming system
2:3 ratio
Dinitrogen trioxide

31. OF2
What is the name of this compound?
Is it ionic or molecular?

32. OF2
THINK: O is a nonmetal, this is an molecular compound
Use the prefix naming system
1:2 ratio
Oxygen difluoride

33. SO3
What is the name of this compound?
Is it ionic or molecular?

34. SO3
THINK: S is a nonmetal, this is an molecular compound
Use the prefix naming system
1:3 ratio
Sulfur trioxide

35. SiO2
What is the name of this compound?
Is it ionic or molecular?

36. SiO2
THINK: Si is a nonmetal, this is an molecular compound
Use the prefix naming system
1:2 ratio
Silicon dioxide

37. SiF4
What is the name of this compound?
Is it ionic or molecular?

38. SiF4 Silicon tetrafluoride
THINK: Si is a nonmetal, this is an molecular compound
Use the prefix naming system
1:4 ratio
Silicon tetrafluoride

39. H2S
What is the name of this compound?
Is it ionic or molecular?

40. H2S Dihydrogen monosulfide (this is stink gas!)
THINK: H is a nonmetal, this is an molecular compound
Use the prefix naming system
2:1 ratio
Dihydrogen monosulfide (this is stink gas!)

41. AsBr5
What is the name of this compound?
Is it ionic or molecular?

42. AsBr5 Arsenic pentabromide
THINK: As is a nonmetal, this is an molecular compound
Use the prefix naming system
1:5 ratio
Arsenic pentabromide

43. SeO3
What is the name of this compound?
Is it ionic or molecular?

44. SeO3
THINK: Se is a nonmetal, this is an molecular compound
Use the prefix naming system
1:3 ratio
Selenium trioxide

45. PI3
What is the name of this compound?
Is it ionic or molecular?

46. PI3 Phosphorous triiodide
THINK: P is a nonmetal, this is an molecular compound
Use the prefix naming system
1:3 ratio
Phosphorous triiodide

47. FCl
What is the name of this compound?
Is it ionic or molecular?

48. FCl Fluorine monochloride
THINK: F is a nonmetal, this is an molecular compound
Use the prefix naming system
1:1 ratio
Fluorine monochloride

49. HBr
What is the name of this compound?
Is it ionic or molecular?

50. HBr Hydrogen monobromide
THINK: H is a nonmetal, this is an molecular compound
Use the prefix naming system
1:1 ratio
Hydrogen monobromide

51. SBr6
What is the name of this compound?
Is it ionic or molecular?

52. SBr6 Sulfur hexabromide
THINK: S is a nonmetal, this is an molecular compound
Use the prefix naming system
1:6 ratio
Sulfur hexabromide

53. PCl5
What is the name of this compound?
Is it ionic or molecular?

54. PCl5 Phosphorous pentachloride
THINK: P is a nonmetal, this is an molecular compound
Use the prefix naming system
1:5 ratio
Phosphorous pentachloride

55. V2O3
What is the name of this compound?
Is it ionic or molecular?

56. V2O3
THINK: V is a transitional metal, this is an ionic compound
V makes a +3 cation here V+3 O makes a -2 anion O-2
V+3 O-2
2:3 ratio
Vanadium III oxide

57. Cr2(SO4)3
What is the name of this compound?
Is it ionic or molecular?

58. Cr2(SO4)3 Chromium III sulfate
THINK: Cr is a transitional metal, this is an ionic compound
Cr makes a +3 cation here Cr+3 SO4-3 makes a -3 anion SO4-3
Cr+3 SO4-3
2:3 ratio
Chromium III sulfate

59. AsI3
What is the name of this compound?
Is it ionic or molecular?

60. AsI3
THINK: As is a nonmetal, this is an molecular compound
Use the prefix naming system
1:3 ratio
Arsenic triiodide

61. Ta(OH)5
What is the name of this compound?
Is it ionic or molecular?

62. Ta(OH)5 Tantalum hydroxide (no RN needed)
THINK: Ta is a transitional metal, this is an ionic compound
Ta makes a +5 cation here Ta+5 OH-1 makes a -1 anion OH-1
Ta+5 OH-1
1:5 ratio
Tantalum hydroxide (no RN needed)

63. IrCl3
What is the name of this compound?
Is it ionic or molecular?

64. IrCl3 Iridium (III) chloride
THINK: Ir is a transitional metal, this is an ionic compound
Ir makes a +3 cation here Ir+3 Cl-1 makes a -1 anion Cl-1
Ir Cl-1
1:3 ratio
Iridium (III) chloride

65. CSe2
What is the name of this compound?
Is it ionic or molecular?

66. CSe2
THINK: C is a nonmetal, this is an molecular compound
Use the prefix naming system
1:2 ratio
Carbon diselenide

67. Ir3(PO4)4
What is the name of this compound?
Is it ionic or molecular?

68. Ir3(PO4)4 Iridium (IV) phosphate
THINK: Ir is a transitional metal, this is an ionic compound
Ir makes a +4 cation here Ir+4 PO4-3 makes a -3 anion PO4-3
Ir PO4-3
3:4 ratio
Iridium (IV) phosphate

69. ZnO
What is the name of this compound?
Is it ionic or molecular?

70. ZnO Zinc oxide (no RN needed)
THINK: Zn is a transitional metal, this is an ionic compound
Zn makes a +2 cation here Zn+2 O makes a -2 anion O-2
Zn O-2
1:1 ratio
Zinc oxide (no RN needed)

71. CuO
What is the name of this compound?
Is it ionic or molecular?

72. CuO
THINK: Cu is a transitional metal, this is an ionic compound
Cu makes a +2 cation here Cu+2 O makes a -2 anion O-2
Cu O-2
1:1 ratio
Copper II oxide

73. Cu2O
What is the name of this compound?
Is it ionic or molecular?

74. Cu2O
THINK: Cu is a transitional metal, this is an ionic compound
Cu makes a +1 cation here Cu+1 O makes a -2 anion O-2
Cu O-2
2:1 ratio
Copper I oxide

75. CuS
What is the name of this compound?
Is it ionic or molecular?

76. CuS
THINK: Cu is a transitional metal, this is an ionic compound
Cu makes a +2 cation here Cu+2 S makes a -2 anion S-2
Cu S-2
The 2:2 ratio becomes a 1:1 ratio
Copper II sulfide

77. ZrS2
What is the name of this compound?
Is it ionic or molecular?

78. ZrS2 Zirconium sulfide (no RN needed)
THINK: Zr is a transitional metal, this is an ionic compound
Zr makes a +4 cation here Zr+4 S makes a -2 anion S-2
Zr S-2
The 2:4 ratio becomes a 1:2 ratio
Zirconium sulfide (no RN needed)

79. ZnS
What is the name of this compound?
Is it ionic or molecular?

80. ZnS Zinc sulfide (no RN needed)
THINK: Zn is a transitional metal, this is an ionic compound
Zn makes a +2 cation here Zn+2 S makes a -2 anion S-2
Zn S-2
1:1 ratio
Zinc sulfide (no RN needed)

81. Ca(OH)2
What is the name of this compound?
Is it ionic or molecular?

82. Ca(OH)2 Calcium hydroxide
THINK: Ca is a metal, this is an ionic compound
Ca makes a +2 cation here Ca+2 hydroxide makes a -1 anion OH-1
Ca OH-1
1:2 ratio
Calcium hydroxide

83. Mg3N2
What is the name of this compound?
Is it ionic or molecular?

84. Mg3N2
THINK: Mg is a metal, this is an ionic compound
Mg makes a +2 cation here Mg+2 N makes a -3 anion N-3
Mg N-3
3:2 ratio
Magnesium nitride

85. SrF2
What is the name of this compound?
Is it ionic or molecular?

86. SrF2 Strontium fluoride
THINK: Sr is a metal, this is an ionic compound
Sr makes a +2 cation here Sr+2 F makes a -1 anion F-1
Sr F-1
1:2 ratio
Strontium fluoride

87. Rb3P
What is the name of this compound?
Is it ionic or molecular?

88. Rb3P Rubidium phosphide
THINK: Rb is a metal, this is an ionic compound
Rb makes a +1 cation here Rb+1 P makes a -3 anion P-3
Rb P-3
3:1 ratio
Rubidium phosphide

89. Rb3PO4
What is the name of this compound?
Is it ionic or molecular?

90. Rb3PO4 Rubidium phosphate
THINK: Rb is a metal, this is an ionic compound
Rb makes a +1 cation here Rb+1 PO4-3 makes a -3 anion PO4-3
Rb PO4-3
3:1 ratio
Rubidium phosphate

91. (NH4)3PO4
What is the name of this compound?
Is it ionic or molecular?

92. (NH4)3PO4 Ammonium phosphate
THINK: NH4+1 makes a cation, this is an ionic compound
NH4+1 makes a +1 cation here NH4+1 PO4-3 makes a -3 anion PO4-3
NH PO4-3
3:1 ratio
Ammonium phosphate

93. NH4I
What is the name of this compound?
Is it ionic or molecular?

94. NH4I
THINK: NH4+1 makes a cation, this is an ionic compound
NH4+1 makes a +1 cation here NH4+1 I-1 makes a -1 anion I-1
NH I-1
1:1 ratio
Ammonium iodide

95. AgNO3
What is the name of this compound?
Is it ionic or molecular?

96. AgNO3 Silver nitrate (no RN needed)
THINK: Ag+1 is a metal, this is an ionic compound
Ag+1 makes a +1 cation here Ag+1 NO3-1 makes a -1 anion NO3-1
Ag I-1
1:1 ratio
Silver nitrate (no RN needed)

97. AgNO2
What is the name of this compound?
Is it ionic or molecular?

98. AgNO2 Silver nitrite (no RN needed)
THINK: Ag+1 is a metal, this is an ionic compound
Ag+1 makes a +1 cation here Ag+1 NO2-1 makes a -1 anion NO2-1
Ag I-1
1:1 ratio
Silver nitrite (no RN needed)

99. Bi(NO2)5
What is the name of this compound?
Is it ionic or molecular?

100. Bi(NO2)5 Bismuth (V) nitrite
THINK: Bi is a transitional metal, this is an ionic compound
Bi makes a +5 cation here Bi+5 NO2-1 makes a -1 anion NO2-1
Bi NO2-1
1:5 ratio
Bismuth (V) nitrite

101. Bi(NO3)5
What is the name of this compound?
Is it ionic or molecular?

102. Bi(NO3)5 Bismuth (V) nitrate
THINK: Bi is a transitional metal, this is an ionic compound
Bi makes a +5 cation here Bi+5 NO3-1 makes a -1 anion NO3-1
Bi NO3-1
1:5 ratio
Bismuth (V) nitrate