81) What is the name of the compound with the formula CF4?
A) carbon fluoride
B) carbon(IV) fluoride
C) fluorine carbonide
D) carbon tetrafluoride
82) What is the name of the compound with the formula SO3?
A) sulfur(VI) oxide
B) sulfur oxide(III)
C) sulfur trioxide
D) sulfur(I) oxide(III)
83) The compound dinitrogen trioxide would have the chemical formula
A) NO3.
B) N3O2.
C) N2O3.
D) N2O5.
84) Hydrogen is a diatomic molecule, H2. The bond holding the hydrogen atoms together is
A) ionic.
B) nonpolar covalent.
C) polar covalent.
D) metallic.
85) In a nonpolar covalent bond, electrons are
A) shared equally.
B) shared unequally.
C) transferred.
D) uncharged.
86) ________ is the measure of the tendency of an atom in a molecule to attract a shared pair of electrons
to itself.
A) Ionization
B) Electronegativity
C) Polarity
D) Precipitation
87) Which one of the following has the LOWEST electronegativity?
A) sodium
B) oxygen
C) chlorine
D) fluorine
88) In the hydrogen chloride molecule, HCl, the chlorine end of the molecule is more negative than the
hydrogen end because
A) chlorine is more electronegative than hydrogen.
B) hydrogen is more electronegative than chlorine.
C) hydrogen and chlorine have the same electronegativity.
D) hydrogen transfers an electron to chlorine.
89) In a covalent bond, the shared electrons are sometimes referred to as
A) core electrons.
B) bonding pairs.
C) nonbonding pairs.
D) neutral pairs.
90) Which substance has nonpolar covalent bonds?
A) H2
B) NO2
C) NaBr
D) CO
91) Which substance has polar covalent bonds?
A) SO2
B) N2
C) F2
D) BaO
92) Which substance has polar covalent bonds?
A) Rn
B) NH3
C) F2
D) Ca2C
93) When two chlorine atoms combine with each other, the bond that forms is
A) ionic.
B) polar covalent.
C) nonpolar covalent.
D) ionic covalent.
94) The most electronegative atom is
A) Cl.
B) F.
C) Na.
D) I.
95) When a fluorine atom reacts with a chlorine atom, the bond that forms between them should be
A) ionic.
B) polar covalent.
C) nonpolar covalent.
D) ionic covalent.
96) Which substance has covalent bonds?
A) KF
B) NaF
C) MgI2
D) CO2
97) In a polar covalent bond, electrons are
A) shared equally.
B) shared unequally.
C) transferred.
D) uncharged.
98) Which of the following elements has the highest electronegativity?
A) O
B) H
C) Cl
D) F
99) Which of the following elements has the lowest electronegativity?
A) K
B) Kr
C) Br
D) Se
100) Which of the following pairs of atoms will form a polar covalent bond?
A) Ne and Ar
B) H and O
C) H and C
D) C and C
101) A nonpolar covalent bond will form between atoms that have an electronegativity difference of
A) < 0.5.
B) between 0.5 and 1.5.
C) between 1.0 and 2.0.
D) > 2.0.
102) Which of the following atoms will have the lowest electronegativity value?
A) an atom with 1 valence electron
B) an atom with 3 valence electrons
C) an atom with 5 valence electrons
D) an atom with 7 valence electrons
103) Hydrogen and carbon react to form
A) CH.
B) CH2.
C) CH3.
D) CH4.
104) Hydrogen and nitrogen react to form
A) NH.
B) NH2.
C) NH3.
D) NH4.
105) Hydrogen and sulfur react to form
A) HS.
B) H2S.
C) HS2.
D) H4S2.
106) Water is the common name for which molecule?
A) H2O
B) HO2
C) HO
D) H2O2
107) Methane is the common name for which molecule?
A) NH3
B) CH4
C) HF
D) CF4
108) The common name of the compound with the formula NH3 is
A) ammonia.
B) vinegar.
C) methane.
D) alcohol.
109) An atom with four valence electrons will form ________ bond(s) with other atoms.
A) 0
B) 1
C) 4
D) 3
110) What is the formula of ammonium nitrate?
A) NH4NO3
B) (NH4)2NO3
C) NH4(NO3)2
D) NH4N
111) Sodium hydroxide is commonly known as lye. The formula of sodium hydroxide is
A) NaOH.
B) Na2OH.
C) Na(OH)2.
D) SOH.
112) Chalk is primarily composed of calcium carbonate. The formula of calcium carbonate is
A) CaCO3.
B) Ca2CO3.
C) Ca(CO3)2.
D) Ca3(CO3)2.
113) The formula of iron(II) phosphate is
A) FePO4.
B) Fe2PO4.
C) Fe2(PO4)3.
D) Fe3(PO4)2.
114) What is the name of NaH2PO4?
A) sodium hydrogen phosphate
B) sodium dihydrogen phosphate
C) monosodium dihydrogen monophosphate
D) sodium(II) dihydrogen monophosphate
115) In the formula for copper(II) phosphate, the number of phosphorus atoms is
A) one.
B) two.
C) three.
D) four.
116) In the formula for ammonium nitrate, the number of nitrogen atoms is
A) one.
B) two.
C) three.
D) four.
117) How many phosphorus atoms are in the formula for potassium dihydrogen phosphate?
A) 1
B) 2
C) 3
D) 4
118) How many iron atoms are in the formula for iron(III) oxide?
A) 1
B) 2
C) 3
D) 4
119) How many oxygen atoms are in the formula for iron(III) oxide?
A) 1
B) 2
C) 3
D) 4
120) How many magnesium atoms are in the formula for magnesium nitride?
A) 1
B) 2
C) 3
D) 4
121) How many nitrogen atoms are in the formula for magnesium nitride?
A) 1
B) 2
C) 3
D) 4
122) The formula of sodium chromate is
A) NaCrO4.
B) Na2Cr.
C) Na2CrO4.
D) Na3(CrO4)2.
123) Which of the following is a polyatomic ion?
A) HCN
B) Na+
C) H2
D) SO42-
124) The chemical formula for silver sulfate is
A) AgSO4.
B) Ag2SO4.
C) Ag(SO4)2.
D) Ag3SO4.
125) The correct formula for lithium acetate is
A) LiC2H3O2.
B) Li3C2H3O2.
C) Li2C2O3H2.
D) Li(C2H3O2)2.
126) The correct formula for the nitrite ion is
A) NO3
–.
B) NO32-.
C) NO22-.
D) NO2–.
127) The correct formula for iron(III) carbonate is
A) FeCO3.
B) Fe2CO3.
C) Fe3CO3.
D) Fe2(CO3)3.
128) NO2– is the ________ ion.
A) ammonium
B) cyanide
C) nitrate
D) nitrite
129) The electron dot formula for carbon monoxide, CO, is