Question 1

Which of these is the correct Lewis dot structure for sulfur?

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)    D

Question 2

Which of these is the correct molecular geometry of BF3?

Accepted Answer

A)  Linear 
B)  Trigonal planar 
C)  Tetrahedral 
D)  Trigonal pyramidal 
E)  Bent 
A)  Linear 
B)  Trigonal planar 
C)  Tetrahedral 
D)  Trigonal pyramidal 
E)  Bent B

Question 3

Which of the following is true about sodium?

Accepted Answer

A)  It is most stable as an atom. 
B)  It is most stable as a negatively charged ion. 
C)  It is most stable as a positively charged ion. 
D)  All forms of sodium are very stable. 
E)  All forms of sodium are very unstable. 
A)  It is most stable as an atom. 
B)  It is most stable as a negatively charged ion. 
C)  It is most stable as a positively charged ion. 
D)  All forms of sodium are very stable. 
E)  All forms of sodium are very unstable. C

Question 4

Which of these substances are ionic compounds?
I. NCl3
II. MgF2
III. AlBr3
IV. CH4

Accepted Answer

A)  I and II 
B)  II and III 
C)  II and IV 
D)  II, III, and IV 
E)  I and IV 
A)  I and II 
B)  II and III 
C)  II and IV 
D)  II, III, and IV 
E)  I and IV

Question 5

Which of the following is true of a nonpolar bond?

Accepted Answer

A)  One side of a nonpolar bond is electron deficient. 
B)  A nonpolar bond is formed because of varying electronegativities in atoms. 
C)  A nonpolar bond has an uneven electron distribution. 
D)  Molecules in a nonpolar bond do not have a charge separation. 
E)  None of these 
A)  One side of a nonpolar bond is electron deficient. 
B)  A nonpolar bond is formed because of varying electronegativities in atoms. 
C)  A nonpolar bond has an uneven electron distribution. 
D)  Molecules in a nonpolar bond do not have a charge separation. 
E)  None of these

Question 6

Which of the following is true of electronegativity?

Accepted Answer

A)  The elements at the bottom of the periodic table have greater electronegativity than the elements at the top of the table. 
B)  The elements in the same row of the periodic table have equal electronegativity. 
C)  The elements in the same column of the periodic table have equal electronegativity. 
D)  The elements to the right of the periodic table have greater electronegativity than the elements to the left of the table. 
E)  The elements in the periodic table are arranged in the decreasing order  of their electronegativity. 
A)  The elements at the bottom of the periodic table have greater electronegativity than the elements at the top of the table. 
B)  The elements in the same row of the periodic table have equal electronegativity. 
C)  The elements in the same column of the periodic table have equal electronegativity. 
D)  The elements to the right of the periodic table have greater electronegativity than the elements to the left of the table. 
E)  The elements in the periodic table are arranged in the decreasing order  of their electronegativity.

Question 7

The averaging of two identical Lewis structures is called _____.

Accepted Answer

A)  reverberation 
B)  resonance 
C)  covalence 
D)  shaping 
E)  structuring 
A)  reverberation 
B)  resonance 
C)  covalence 
D)  shaping 
E)  structuring

Question 8

The total number of valence electrons in NO  2  −  is _____.

Accepted Answer

A)  16 
B)  17 
C)  18 
D)  15 
E)  19 
A)  16 
B)  17 
C)  18 
D)  15 
E)  19

Question 9

How many lone pairs of electrons are present around the central atom in CH4?

Accepted Answer

A)  0 
B)  1 
C)  2 
D)  3 
E)  4 
A)  0 
B)  1 
C)  2 
D)  3 
E)  4

Question 10

How many bonding pairs of electrons are present around the central atom in HCN?

Accepted Answer

A)  0 
B)  1 
C)  2 
D)  3 
E)  4 
A)  0 
B)  1 
C)  2 
D)  3 
E)  4

Question 11

How many lone pairs of electrons are present around the central atom in H2O?

Accepted Answer

A)  0 
B)  1 
C)  2 
D)  3 
E)  4 
A)  0 
B)  1 
C)  2 
D)  3 
E)  4

Question 12

Which of these will not form a positive ion in an ionic compound?

Accepted Answer

A)  Ba 
B)  Rb 
C)  P 
D)  Sn 
E)  Mg 
A)  Ba 
B)  Rb 
C)  P 
D)  Sn 
E)  Mg

Question 13

Which of the following is the molecular  geometry of NH3?

Accepted Answer

A)  Tetrahedral 
B)  Bent 
C)  Trigonal pyramidal 
D)  Trigonal planar 
E)  Linear 
A)  Tetrahedral 
B)  Bent 
C)  Trigonal pyramidal 
D)  Trigonal planar 
E)  Linear

Question 14

The element with the highest electronegativity is _____.

Accepted Answer

A)  fluorine 
B)  hydrogen 
C)  helium 
D)  neon 
E)  chlorine 
A)  fluorine 
B)  hydrogen 
C)  helium 
D)  neon 
E)  chlorine

Question 15

Which of these substances are covalent compounds?
I. CaO
II. H20
III. PF3
IV. CH4

Accepted Answer

A)  I and II 
B)  II and III 
C)  II and IV 
D)  II, III, and IV 
E)  I, II, and III 
A)  I and II 
B)  II and III 
C)  II and IV 
D)  II, III, and IV 
E)  I, II, and III

Question 16

How many lone pairs of electrons are present around the central atom in PCl3?

Accepted Answer

A)  0 
B)  1 
C)  2 
D)  3 
E)  20 
A)  0 
B)  1 
C)  2 
D)  3 
E)  20

Question 17

Which of the following is true about a water molecule?

Accepted Answer

A)  It is a nonpolar molecule. 
B)  It has a bent electron geometry. 
C)  It has a linear molecular geometry. 
D)  It has two lone pairs of electrons on the central atom. 
E)  It contains two double bonds. 
A)  It is a nonpolar molecule. 
B)  It has a bent electron geometry. 
C)  It has a linear molecular geometry. 
D)  It has two lone pairs of electrons on the central atom. 
E)  It contains two double bonds.

Question 18

Which of the following is true according to the octet rule ?

Accepted Answer

A)  A stable electron configuration usually involves eight electrons. 
B)  An atom must have eight protons. 
C)  All elements with an atomic number of eight and above are metals. 
D)  Eight electrons are transferred from one atom to another during ionic bonding. 
E)  Elements with less than eight electrons have a linear molecular geometry. 
A)  A stable electron configuration usually involves eight electrons. 
B)  An atom must have eight protons. 
C)  All elements with an atomic number of eight and above are metals. 
D)  Eight electrons are transferred from one atom to another during ionic bonding. 
E)  Elements with less than eight electrons have a linear molecular geometry.

Question 19

Which of these is the correct formula for sodium phosphide?

Accepted Answer

A)  NaP 
B)  NaP2 
C)  Na3P 
D)  NaP3 
E)  Na3P2 
A)  NaP 
B)  NaP2 
C)  Na3P 
D)  NaP3 
E)  Na3P2

Question 20

Which of these elements has the lowest electronegativity?

Accepted Answer

A)  Ca 
B)  N 
C)  Se 
D)  P 
E)  O 
A)  Ca 
B)  N 
C)  Se 
D)  P 
E)  O

Which of these is the correct Lewis dot structure for sulfur?

Which of these is the correct molecular geometry of BF₃?

Which of the following is true about sodium?

Which of these substances are ionic compounds? I. NCl₃ II. MgF₂ III. AlBr₃ IV. CH₄

Which of the following is true of a nonpolar bond?

Which of the following is true of electronegativity?

The averaging of two identical Lewis structures is called _____.

The total number of valence electrons in NO ₂⁻ is _____.

How many lone pairs of electrons are present around the central atom in CH₄?

How many bonding pairs of electrons are present around the central atom in HCN?

How many lone pairs of electrons are present around the central atom in H₂O?

Which of these will not form a positive ion in an ionic compound?

Which of the following is the molecular geometry of NH₃?

The element with the highest electronegativity is _____.

Which of these substances are covalent compounds? I. CaO II. H₂0 III. PF₃ IV. CH₄

How many lone pairs of electrons are present around the central atom in PCl₃?

Which of the following is true about a water molecule?

Which of the following is true according to the octet rule ?

Which of these is the correct formula for sodium phosphide?

Which of these elements has the lowest electronegativity?

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Exam 5: Chemical Bonding

Which of these is the correct Lewis dot structure for sulfur?

Which of these is the correct molecular geometry of BF3?

Which of the following is true about sodium?

Which of these substances are ionic compounds? I. NCl3 II. MgF2 III. AlBr3 IV. CH4

Which of the following is true of a nonpolar bond?

Which of the following is true of electronegativity?

The averaging of two identical Lewis structures is called _____.

The total number of valence electrons in NO 2 − is _____.

How many lone pairs of electrons are present around the central atom in CH4?

How many bonding pairs of electrons are present around the central atom in HCN?

How many lone pairs of electrons are present around the central atom in H2O?

Which of these will not form a positive ion in an ionic compound?

Which of the following is the molecular geometry of NH3?

The element with the highest electronegativity is _____.

Which of these substances are covalent compounds? I. CaO II. H20 III. PF3 IV. CH4

How many lone pairs of electrons are present around the central atom in PCl3?

Which of the following is true about a water molecule?

Which of the following is true according to the octet rule ?

Which of these is the correct formula for sodium phosphide?

Which of these elements has the lowest electronegativity?

Molecular Reasons

The Chemists Toolbox

Atoms and Elements

Molecules, Compounds, and Chemical Reactions

Organic Chemistry

Light and Color

Nuclear Chemistry

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Energy for Tomorrow: Solar and Other Renewable Energy Sources

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The Liquids and Solids Around Us: Especially Water

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Which of these is the correct molecular geometry of BF₃?

Which of these substances are ionic compounds? I. NCl₃ II. MgF₂ III. AlBr₃ IV. CH₄

The total number of valence electrons in NO ₂⁻ is _____.

How many lone pairs of electrons are present around the central atom in CH₄?

How many lone pairs of electrons are present around the central atom in H₂O?

Which of the following is the molecular geometry of NH₃?

Which of these substances are covalent compounds? I. CaO II. H₂0 III. PF₃ IV. CH₄

How many lone pairs of electrons are present around the central atom in PCl₃?