CHEM 1001/CHM 1020/CHM1025C/CHM 1032C†††††† ††††††††††† Name _____ Answers ___________

Module Four Exam

Module Four: Part A: Bond Recognition††††††††††††††††††††††††††††† 5 points


Using a periodic chart, classify each element in the pair as a metal or nonmetal, then predict the bond type that should exist between the two elements.(Assume all metal-nonmetal combinations have an electronegativity difference greater than 1.7.)







































Module Four: Part C: Binary Molecular Compounds†††††††††† 5 points


Using a periodic chart write the names or formulas of the following compounds depending on whether the formula or the name is given.







___carbon dioxide ____






___Sulfur dioxide______






___Dinitrogen Trioxide__

4.†††† Phosphorus Pentachloride†††††††††† ___PCl5_____


5.†††† Nitrogen Trihydride (Ammonia)††† ___NH3_____



Module Four: Part D: Binary Ionic Compounds†††††††††††††††††† 5 points


Using a periodic chart, write the names or the balanced formulas for the following compounds depending on whether the formula or the name is given:


1.†††† Lithium Sulfide†††††††††† ___Li2S_____________


2.†††† Iron II Chloride††††† †††††____FeCl2____________


3.†††† Tin IV Fluoride†††††††††† ____SnF4____________


4.†††† CaF2††††††††††††††††††††††††† __Calcium fluoride_________


5.†††† Co3P2†††††††††††††††††††††††† __Cobalt II phosphide______________




Module Four: Part B: Dot Structures of Modules††††††††††††††† 30 points


Using a periodic chart draw the electron dot structures of the following molecules:

(Choose One for each question or the one circled on the paper)


You may practice your drawing by dragging and dropping the atoms on the Internet at:


1.NH3†† CH4††† H2O2†††† H2O††††††††††† 2.††††† H2SO4†† H3PO4†† HClO4

Ammonia††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††† Sulfuric Acid

Methane††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††† ††††††††††††††† Phosphoric Acid

hydrogen peroxide††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††† Perchloric Acid







3.†††† HNO3†† H2CO3HNO2†††††††††††† 4.††††† CO2††† HCN††† CO†† SO3††

Nitric Acid††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††† Carbon Dioxide

Carbonic Acid†††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††† Hydrogen Cyanide

Nitrous Acid††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††† Carbon Monoxide

††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††† Sulfur Trioxide





5.†† HC2H3O2†††† H2C2O4††† ††††††††† HCHO2††††††††††††††††††† 6.††††† C2H4††† C2H2†† C3H8†† C2H6

†††††† carbon to carbon by single covalent bond

Acetic Acid†††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††† Ethylene

Oxalic Acid††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††† Acetylene

Formic Acid†††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††† Propane

††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††† Ethane






7. CH2O†††††††††††† CH3COCH3††††††††††††††††††††††††††††††††††††††††††††† CH3OCH3

††††††††††††††††††††††††††† carbon to carbons by single covalent bonds††††††††††††††† oxygen separates the carbons



Dimethyl Ether




Module Four: Part E: Polyatomic Ions††††††† ††††††† 5 points


Using a periodic chart write the names or formulas of the polyatomic ions depending on whether the formula or the name is given.†† (The formula must include the ionís appropriate charge.)


1.†††† SiO3 2-††††††††††† __silicate______________

2.†††† SO4 2-†††††††††††__sulfate______________


3.†††† PO4 3-†††††††††††† __phosphate___________


4.†††† ClO4 1-††††††††††† __perchlorate__________


5.†††† NO2 1-†††††††††††† __nitrite_____________


6.†††† Hydroxide††††† __OH 1-______________

7.†††† Ammonium††† __NH4 1+______________


8.†††† Hypochlorite__ClO 1-______________


9.†††† Nitrate††††††††††† __NO3 1-_____________


10.††† Sulfite††††††††††† __SO3 2-______________




BONUS: If you miss one of the above questions, one of the ions below will replace

††††††††††††††††††††† any incorrect answer, provided the bonus answer is correct.


Bonus #1††††† Acetate†††††††††††††††††† ___C2H3O2 1-_____________


Bonus #2††††† Cyanide††††††††††††††††† ___CN 1-_____________


Bonus #3††††† Thiocyanate†††† †††††††___CNS 1-_____________



Module Four: Part F: Ternary Ionic Compounds†††††††††††††††††††††††† 5 points


Using a periodic chart write the names or formulas of the following compounds depending on whether the formula or name is given:



1.†††† K2SiO3††††††††††† _Potassium silicate______________

2.†††† Na3PO4 ††††††††††_Sodium phosphate_____________


3.†††† (NH4)2SO3 ††††††_Ammonium sulfite______________


4.†††† Mg(OH)3†††††††† __Magnesium hydroxide__________


5.†††† Fe(IO3)3††††††††† __Iron III Iodate______________


6.†††† Ammonium Hydroxide††††† ___NH4OH_____________

7.†††† Aluminum Hydroxide††††††† ___Al(OH)3_____________


8.†††† Sodium Perchlorate††††††††† ___NaClO4_____________


9.†††† Calcium Nitrite††††††††††††††††† ___Ca(NO2)2____________


10. †††Copper II Sulfate††††††††††††† ____CuSO4___________


Module Four: Part G: Binary/Ternary Acid†††††††††††††††††† 5 points


Using a periodic chart write the names or balanced chemical formulas of the following compounds, depending on whether the formula or the name is given. (Assume all compounds in a aqueous solution):




1.†††† HCl†††††††††††††††††††††† _Hydrochloric Acid_______________


2.†††† HClO ††††††††††††††††††††_Hypochlorous Acid_______________


3.†††† HClO2 †††††††††††††††††††_Chlorous Acid_______________


4.††† HClO3†††††††††††††††††††† _Chloric Acid______________


5.††† HClO4†††††††††††††††††††† _Perchloric Acid_______________


6.†††† Nitric Acid††††††††††††† __HNO3______________

7.†††† Carbonic Acid††††††† __H2CO3______________


8.††† Sulfuric Acid†††††††††† __H2SO4______________


9.†††† Phosphoric Acid†††† __H3PO4______________


10.††† Nitrous Acid††††††††††† __HNO2______________


Module Four: Part H:†† Inorganic Compounds†††††††††††††††††††††††††††††††††††††††††††††† 10 points


Using a periodic chart write the names or balanced chemical formulas of the following compounds, depending on whether the formula or the name is given:




1.†††† CO2††††††††††††††††††††††††††††††† __Carbon dioxide_____________


2.†††† H2O2 ††††††††††††††††††††††††††††††__Dihydrogen dioxide (Hydrogen Peroxide)_


3.†††† HBrO3 (aq)††††††††††††††††††† __Bromic Acid______________


4.†††† Fe2O3†††††††††††††††††††††††††††† __Iron III oxide______________


5.††† NiSO4††††††††††††††††††††††††††††† __Nickel II sulfate______________


6.†††† Calcium Phosphate†††††† __Ca3(PO4)2______________

7.†††† Sodium Hydroxide†††††††† ___NaOH_____________


8.†††† Sulfurous Acid††††††††††††††† ___H2SO3_____________


9.†††† Aluminum Carbonate†††† ___Al2(CO3)3_____________


10.††† Ammonium Chloride††† ††___NH4Cl_____________


Module Four: Part M:†† Multiple Choice††††††††††††††††††††††† 10 points


1.†† According to the general trends in the periodic table, which of the following†††††††††††††††††††††† elements is the most electronegative?



(a) O


(b) F


(c) P


(d) S


(e) Cl



2.†† Draw the electron dot formula for ethylene, C2H4, and state the type of bonds in one††††††† molecule.



(a) 6 single†††††† bonds


(b) 5 single††††††† bonds


(c) 4 single††††††† bonds and 1 double bond


(d) 4 single†††††† bonds and 2 doublebonds


(e) 4 single†††††† bonds and 1 triple bond



3.†† Magnesium metal and oxygen gas react to form the ionic compound magnesium†††††††††††† oxide.Which of the following statements is true?


(a) Valence electrons are transferred from oxygen to magnesium atoms.

(b) The magnesium atom and the magnesium ion have the same number of valence†††††††††††† electrons.

(c) Magnesium and magnesium oxide have similar properties.

(d) The smallest representative particle is a molecule.

(e) none of the above



4.†† Which noble gas is isoelectronic with a lithium ion?



(a) helium


(b) neon


(c) argon


(d) krypton


(e) xenon



5.†† Which of the following ions has the electron configuration 1s2 2s2 2p6



(a) F-1


(b) O2-


(c) N3-


(d) all of the above


(e) none of the above







6.†† What type of chemical bond results from transferring valence electrons from a metal††††††† to a nonmetal?



(a) covalent bond


(b) ionic bond


(c) metallic bond


(d) coordinate covalent bond


(e) none of the above



7.†† The mercury (II) ion, Hg2+, is classified as which of the following?



(a) monoatomic cation


(b) monoatomic anion


(c) polyatomic cation


(d) polyatomic anion


(e) none of the above



8.†† Aqueous H2S is classified as which of the following?



(a) binary ionic


(b) ternary ionic


(c) binary molecular


(d) binary acid


(e) ternary oxyacid



9.†† What is the formula for the nitride ion?



(a) N3-


(b) N2-


(c) NĖ


(d) NO2-


(e) NO2-





10.†† What is the formula for the hydrogen carbonate ion?



(a) C2H3O2-1


(b) C2H3O22-


(c) HCO3-1


(d) HCO32-


(e) none of the above