Chem 200 Answer Key maganda

Chapter 1: Multiple Choice Questions

Results

You have answered 1 out of 20 questions correctly.

Your percentage score is 5%.

Question 1

Which is the ground-state electronic configuration of chlorine?

Your answer:

c) 1s22s22p63s23p5

Feedback:

For electronic configurations of elements, see pp. 4-5.

Question 2

Which is the ground-state electronic configuration of Na+?

You did not answer the question.

Correct answer:

d) 1s22s22p6

Feedback:

In a cation, one electron is lost from the atom per positive charge. See pp. 6-7.

Question 3

Which of the following atoms or ions has the electronic configuration

1s22s22p63s23p6 ?

You did not answer the question.

Correct answer:

c) Cl-

Feedback:

The electronic configuration indicates a complete octet in the third shell and

corresponds to Ar. See pp. 4-7 and the periodic table at the front of the book.

Question 4

Which of the following elements is less electronegative than carbon?

You did not answer the question.

Correct answer:

a) Si

Feedback:

For the electronegativity of elements, see p. 8.

Question 5

Which of the following bonds is the most polar?

You did not answer the question.

Correct answer:

b) O-H

Feedback:

Compare the electronegativities of the bonded atoms: see p. 10 for the

polarities of bonds.

Question 6

Which is a correct Lewis structure for carbon dioxide, CO2?

You did not answer the question.

Correct answer:

a) 

Feedback:

For drawing Lewis structures, see pp. 12-18. Confirm the number of lone pairs

on each atom.

Question 7

Which is a correct Lewis structure for carbonic acid, H2CO3?

You did not answer the question.

Correct answer:

c) 

Feedback:

See pp. 12-18. Confirm the number of lone pairs on each atom.

Question 8

Which is a correct Lewis structure for hydrogencarbonate ion, HCO3-?

You did not answer the question.

Correct answer:

c) 

Feedback:

See pp. 12-18. Confirm the number of lone pairs on each atom. The carbon atom

in structure (d) has more valence electrons than an octet.

Question 9

Which is a correct Lewis structure for hydrogen cyanide, HCN?

You did not answer the question.

Correct answer:

d) 

Feedback:

See pp. 12-18. Confirm the number of lone pairs on each atom.

Question 10

Which is a correct Lewis structure for nitric acid, HNO3?

You did not answer the question.

Correct answer:

c) 

Feedback:

See pp. 12-18. The nitrogen atoms in structures (a) and (b) contain more

valence electrons than an octet. Also, confirm the number of lone pairs on each

atom.

Question 11

Which of the following does not have the ground-state configuration 1s22s22p6 ?

You did not answer the question.

Correct answer:

c) Cl-

Feedback:

This electronic configuration indicates a complete octet of the second shell. For

the electronic configurations of atoms and ions of elements, see pp. 4-7.

Question 12

Which of the following elements is the most electronegative?

You did not answer the question.

Correct answer:

c) Cl

Feedback:

For the electronegativity of elements, see p. 8. Elements at the upper right in

the periodic table have higher electronegativities.

Question 13

Which of the following elements is the most electropositive?

You did not answer the question.

Correct answer:

a) B

Feedback:

For the electronegativity of elements, see p. 8. Elements at the lower left in the

periodic table have lower electronegativities (are more electropositive).

Question 14

Which of the following elements is the most electronegative?

You did not answer the question.

Correct answer:

c) F

Feedback:

For the electronegativity of elements, see p. 8. This question is about the

relative electronegativities of the halogens, i.e. elements in the same group.

Question 15

Which of the following elements is the most electropositive?

You did not answer the question.

Correct answer:

d) I

Feedback:

For the electronegativity of elements, see p. 8. This question is also about the

relative electronegativities of the halogens, i.e. elements in the same group.

Question 16

Which of the following compounds has an ionic bond?

You did not answer the question.

Correct answer:

b) NH4Cl

Feedback:

Compare the electronegativities of the main elements involved: see pp. 8-9 for

ionic bonds.

Question 17

Which of the following molecules does not have a dipole moment?

You did not answer the question.

Correct answer:

d) CCl4

Feedback:

For dipole moments, see pp. 10-11. Dipole moments are determined not only by

the polarities of bonds but also by the symmetries of molecules.

Question 18

Which of the following contains an atom (other than hydrogen) which lacks an

octet of valence electrons?

You did not answer the question.

Correct answer:

c) BH3

Feedback:

Confirm the Lewis structure of each species.

Question 19

Which of the following is a correct Lewis structure of diazomethane, CH2N2?

You did not answer the question.

Correct answer:

d) 

Feedback:

For drawing Lewis structures, see pp. 12-18. Confirm the number of lone pairs

on each atom.

Question 20

Which of the following Lewis structures of protonated methanamide is

incomplete?

You did not answer the question.

Correct answer:

b) 

Feedback:

Complete correct Lewis structures should show all lone pairs.

Chapter 1: Multiple Choice Questions

Results

You have answered 1 out of 20 questions correctly.

Your percentage score is 5%.Question 1

Which is the ground-state electronic configuration of chlorine?

Your answer:

c) 1s22s22p63s23p5

Feedback:

For electronic configurations of elements, see pp. 4-5.

Question 2

Which is the ground-state electronic configuration of Na+?

You did not answer the question.

Correct answer:

d) 1s22s22p6

Feedback:

In a cation, one electron is lost from the atom per positive charge. See pp. 6-7.

Question 3

Which of the following atoms or ions has the electronic configuration

1s22s22p63s23p6 ?

You did not answer the question.

Correct answer:

c) Cl-

Feedback:

The electronic configuration indicates a complete octet in the third shell and

corresponds to Ar. See pp. 4-7 and the periodic table at the front of the book.

Question 4

Which of the following elements is less electronegative than carbon?

You did not answer the question.

Correct answer:

a) Si

Feedback:

For the electronegativity of elements, see p. 8.

Question 5

Which of the following bonds is the most polar?

You did not answer the question.

Correct answer:

b) O-H

Feedback:

Compare the electronegativities of the bonded atoms: see p. 10 for the

polarities of bonds.

Question 6

Which is a correct Lewis structure for carbon dioxide, CO2?

You did not answer the question.

Correct answer:

a) 

Feedback:

For drawing Lewis structures, see pp. 12-18. Confirm the number of lone pairs

on each atom.

Question 7

Which is a correct Lewis structure for carbonic acid, H2CO3?

You did not answer the question.

Correct answer:

c) 

Feedback:

See pp. 12-18. Confirm the number of lone pairs on each atom.

Question 8

Which is a correct Lewis structure for hydrogencarbonate ion, HCO3-?

You did not answer the question.

Correct answer:

c) 

Feedback:

See pp. 12-18. Confirm the number of lone pairs on each atom. The carbon atom

in structure (d) has more valence electrons than an octet.

Question 9

Which is a correct Lewis structure for hydrogen cyanide, HCN?

You did not answer the question.

Correct answer:

d) 

Feedback:

See pp. 12-18. Confirm the number of lone pairs on each atom.

Question 10

Which is a correct Lewis structure for nitric acid, HNO3?

You did not answer the question.

Correct answer:

c) 

Feedback:

See pp. 12-18. The nitrogen atoms in structures (a) and (b) contain more

valence electrons than an octet. Also, confirm the number of lone pairs on each

atom.

Question 11

Which of the following does not have the ground-state configuration 1s22s22p6 ?

You did not answer the question.

Correct answer:

c) Cl-

Feedback:

This electronic configuration indicates a complete octet of the second shell. For

the electronic configurations of atoms and ions of elements, see pp. 4-7.

Question 12

Which of the following elements is the most electronegative?

You did not answer the question.

Correct answer:

c) Cl

Feedback:

For the electronegativity of elements, see p. 8. Elements at the upper right in

the periodic table have higher electronegativities.

Question 13

Which of the following elements is the most electropositive?

You did not answer the question.

Correct answer:

a) B

Feedback:

For the electronegativity of elements, see p. 8. Elements at the lower left in the

periodic table have lower electronegativities (are more electropositive).

Question 14

Which of the following elements is the most electronegative?

You did not answer the question.

Correct answer:

c) F

Feedback:

For the electronegativity of elements, see p. 8. This question is about the

relative electronegativities of the halogens, i.e. elements in the same group.

Question 15

Which of the following elements is the most electropositive?

You did not answer the question.

Correct answer:

d) I

Feedback:

For the electronegativity of elements, see p. 8. This question is also about the

relative electronegativities of the halogens, i.e. elements in the same group.

Question 16

Which of the following compounds has an ionic bond?

You did not answer the question.

Correct answer:

b) NH4Cl

Feedback:

Compare the electronegativities of the main elements involved: see pp. 8-9 for

ionic bonds.

Question 17

Which of the following molecules does not have a dipole moment?

You did not answer the question.

Correct answer:

d) CCl4

Feedback:

For dipole moments, see pp. 10-11. Dipole moments are determined not only by

the polarities of bonds but also by the symmetries of molecules.

Question 18

Which of the following contains an atom (other than hydrogen) which lacks an

octet of valence electrons?

You did not answer the question.

Correct answer:

c) BH3

Feedback:

Confirm the Lewis structure of each species.

Question 19

Which of the following is a correct Lewis structure of diazomethane, CH2N2?

You did not answer the question.

Correct answer:

d) 

Feedback:

For drawing Lewis structures, see pp. 12-18. Confirm the number of lone pairs

on each atom.

Question 20

Which of the following Lewis structures of protonated methanamide is

incomplete?

You did not answer the question.

Correct answer:

b) 

Feedback:

Complete correct Lewis structures should show all lone pairs.

Chapter 1: Multiple Choice Questions

Results

You have answered 1 out of 20 questions correctly.

Your percentage score is 5%.Question 1

Which is the ground-state electronic configuration of chlorine?

Your answer:

c) 1s22s22p63s23p5

Feedback:

For electronic configurations of elements, see pp. 4-5.

Question 2

Which is the ground-state electronic configuration of Na+?

You did not answer the question.

Correct answer:

d) 1s22s22p6

Feedback:

In a cation, one electron is lost from the atom per positive charge. See pp. 6-7.

Question 3

Which of the following atoms or ions has the electronic configuration

1s22s22p63s23p6 ?

You did not answer the question.

Correct answer:

c) Cl-

Feedback:

The electronic configuration indicates a complete octet in the third shell and

corresponds to Ar. See pp. 4-7 and the periodic table at the front of the book.

Question 4

Which of the following elements is less electronegative than carbon?

You did not answer the question.

Correct answer:

a) Si

Feedback:

For the electronegativity of elements, see p. 8.

Question 5

Which of the following bonds is the most polar?

You did not answer the question.

Correct answer:

b) O-H

Feedback:

Compare the electronegativities of the bonded atoms: see p. 10 for the

polarities of bonds.

Question 6

Which is a correct Lewis structure for carbon dioxide, CO2?

You did not answer the question.

Correct answer:

a) 

Feedback:

For drawing Lewis structures, see pp. 12-18. Confirm the number of lone pairs

on each atom.

Question 7

Which is a correct Lewis structure for carbonic acid, H2CO3?

You did not answer the question.

Correct answer:

c) 

Feedback:

See pp. 12-18. Confirm the number of lone pairs on each atom.

Question 8

Which is a correct Lewis structure for hydrogencarbonate ion, HCO3-?

You did not answer the question.

Correct answer:

c) 

Feedback:

See pp. 12-18. Confirm the number of lone pairs on each atom. The carbon atom

in structure (d) has more valence electrons than an octet.

Question 9

Which is a correct Lewis structure for hydrogen cyanide, HCN?

You did not answer the question.

Correct answer:

d) 

Feedback:

See pp. 12-18. Confirm the number of lone pairs on each atom.

Question 10

Which is a correct Lewis structure for nitric acid, HNO3?

You did not answer the question.

Correct answer:

c) 

Feedback:

See pp. 12-18. The nitrogen atoms in structures (a) and (b) contain more

valence electrons than an octet. Also, confirm the number of lone pairs on each

atom.

Question 11

Which of the following does not have the ground-state configuration 1s22s22p6 ?

You did not answer the question.

Correct answer:

c) Cl-

Feedback:

This electronic configuration indicates a complete octet of the second shell. For

the electronic configurations of atoms and ions of elements, see pp. 4-7.

Question 12

Which of the following elements is the most electronegative?

You did not answer the question.

Correct answer:

c) Cl

Feedback:

For the electronegativity of elements, see p. 8. Elements at the upper right in

the periodic table have higher electronegativities.

Question 13

Which of the following elements is the most electropositive?

You did not answer the question.

Correct answer:

a) B

Feedback:

For the electronegativity of elements, see p. 8. Elements at the lower left in the

periodic table have lower electronegativities (are more electropositive).

Question 14

Which of the following elements is the most electronegative?

You did not answer the question.

Correct answer:

c) F

Feedback:

For the electronegativity of elements, see p. 8. This question is about the

relative electronegativities of the halogens, i.e. elements in the same group.

Question 15

Which of the following elements is the most electropositive?

You did not answer the question.

Correct answer:

d) I

Feedback:

For the electronegativity of elements, see p. 8. This question is also about the

relative electronegativities of the halogens, i.e. elements in the same group.

Question 16

Which of the following compounds has an ionic bond?

You did not answer the question.

Correct answer:

b) NH4Cl

Feedback:

Compare the electronegativities of the main elements involved: see pp. 8-9 for

ionic bonds.

Question 17

Which of the following molecules does not have a dipole moment?

You did not answer the question.

Correct answer:

d) CCl4

Feedback:

For dipole moments, see pp. 10-11. Dipole moments are determined not only by

the polarities of bonds but also by the symmetries of molecules.

Question 18

Which of the following contains an atom (other than hydrogen) which lacks an

octet of valence electrons?

You did not answer the question.

Correct answer:

c) BH3

Feedback:

Confirm the Lewis structure of each species.

Question 19

Which of the following is a correct Lewis structure of diazomethane, CH2N2?

You did not answer the question.

Correct answer:

d) 

Feedback:

For drawing Lewis structures, see pp. 12-18. Confirm the number of lone pairs

on each atom.

Question 20

Which of the following Lewis structures of protonated methanamide is

incomplete?

You did not answer the question.

Correct answer:

b) 

Feedback:

Complete correct Lewis structures should show all lone pairs.

Chapter 1: Multiple Choice Questions

Results

You have answered 1 out of 20 questions correctly.

Your percentage score is 5%.Question 1

Which is the ground-state electronic configuration of chlorine?

Your answer:

c) 1s22s22p63s23p5

Feedback:

For electronic configurations of elements, see pp. 4-5.

Question 2

Which is the ground-state electronic configuration of Na+?

You did not answer the question.

Correct answer:

d) 1s22s22p6

Feedback:

In a cation, one electron is lost from the atom per positive charge. See pp. 6-7.

Question 3

Which of the following atoms or ions has the electronic configuration

1s22s22p63s23p6 ?

You did not answer the question.

Correct answer:

c) Cl-

Feedback:

The electronic configuration indicates a complete octet in the third shell and

corresponds to Ar. See pp. 4-7 and the periodic table at the front of the book.

Question 4

Which of the following elements is less electronegative than carbon?

You did not answer the question.

Correct answer:

a) Si

Feedback:

For the electronegativity of elements, see p. 8.

Question 5

Which of the following bonds is the most polar?

You did not answer the question.

Correct answer:

b) O-H

Feedback:

Compare the electronegativities of the bonded atoms: see p. 10 for the

polarities of bonds.

Question 6

Which is a correct Lewis structure for carbon dioxide, CO2?

You did not answer the question.

Correct answer:

a) 

Feedback:

For drawing Lewis structures, see pp. 12-18. Confirm the number of lone pairs

on each atom.

Question 7

Which is a correct Lewis structure for carbonic acid, H2CO3?

You did not answer the question.

Correct answer:

c) 

Feedback:

See pp. 12-18. Confirm the number of lone pairs on each atom.

Question 8

Which is a correct Lewis structure for hydrogencarbonate ion, HCO3-?

You did not answer the question.

Correct answer:

c) 

Feedback:

See pp. 12-18. Confirm the number of lone pairs on each atom. The carbon atom

in structure (d) has more valence electrons than an octet.

Question 9

Which is a correct Lewis structure for hydrogen cyanide, HCN?

You did not answer the question.

Correct answer:

d) 

Feedback:

See pp. 12-18. Confirm the number of lone pairs on each atom.

Question 10

Which is a correct Lewis structure for nitric acid, HNO3?

You did not answer the question.

Correct answer:

c) 

Feedback:

See pp. 12-18. The nitrogen atoms in structures (a) and (b) contain more

valence electrons than an octet. Also, confirm the number of lone pairs on each

atom.

Question 11

Which of the following does not have the ground-state configuration 1s22s22p6 ?

You did not answer the question.

Correct answer:

c) Cl-

Feedback:

This electronic configuration indicates a complete octet of the second shell. For

the electronic configurations of atoms and ions of elements, see pp. 4-7.

Question 12

Which of the following elements is the most electronegative?

You did not answer the question.

Correct answer:

c) Cl

Feedback:

For the electronegativity of elements, see p. 8. Elements at the upper right in

the periodic table have higher electronegativities.

Question 13

Which of the following elements is the most electropositive?

You did not answer the question.

Correct answer:

a) B

Feedback:

For the electronegativity of elements, see p. 8. Elements at the lower left in the

periodic table have lower electronegativities (are more electropositive).

Question 14

Which of the following elements is the most electronegative?

You did not answer the question.

Correct answer:

c) F

Feedback:

For the electronegativity of elements, see p. 8. This question is about the

relative electronegativities of the halogens, i.e. elements in the same group.

Question 15

Which of the following elements is the most electropositive?

You did not answer the question.

Correct answer:

d) I

Feedback:

For the electronegativity of elements, see p. 8. This question is also about the

relative electronegativities of the halogens, i.e. elements in the same group.

Question 16

Which of the following compounds has an ionic bond?

You did not answer the question.

Correct answer:

b) NH4Cl

Feedback:

Compare the electronegativities of the main elements involved: see pp. 8-9 for

ionic bonds.

Question 17

Which of the following molecules does not have a dipole moment?

You did not answer the question.

Correct answer:

d) CCl4

Feedback:

For dipole moments, see pp. 10-11. Dipole moments are determined not only by

the polarities of bonds but also by the symmetries of molecules.

Question 18

Which of the following contains an atom (other than hydrogen) which lacks an

octet of valence electrons?

You did not answer the question.

Correct answer:

c) BH3

Feedback:

Confirm the Lewis structure of each species.

Question 19

Which of the following is a correct Lewis structure of diazomethane, CH2N2?

You did not answer the question.

Correct answer:

d) 

Feedback:

For drawing Lewis structures, see pp. 12-18. Confirm the number of lone pairs

on each atom.

Question 20

Which of the following Lewis structures of protonated methanamide is

incomplete?

You did not answer the question.

Correct answer:

b) 

Feedback:

Complete correct Lewis structures should show all lone pairs.