Unit 3 - Chemical Bonding

Last updated over 2 years ago

25 questions

1

6

1

3

1

3

5

2

3

1

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Unit 3 - Chemical Bonding

Last updated over 2 years ago

25 questions

1

6

Draggable item		Corresponding Item

1

3

Draggable item		Corresponding Item

3

Draggable item		Corresponding Item

1

If oxygen has an electronegativity of 3.5 and hydrogen has an electronegativity of 2.1, what is the difference in electronegativity?

1

Using the Pauling scale, sodium (Na) has an electronegativity of 0.93, whereas chlorine (Cl) has an electronegativity of 3.16. What is the difference?

1

Carbon (electronegativity - 2.55) forms a covalent compound with hydrogen (electronegativity - 2.1). Calculate the difference in electronegativity.

3

5

Show the Ionic compound formation equation for Li and Cl.

2

_______ and _______ form an ion.

3

Draggable item		Corresponding Item

1

Malleability and ductility are characteristics of substances with

ionic bonds

metallic bonds

covalent bonds

polyatomic ions

Which of the following atom's Lewis dot notation shows six valence electrons?

sulfur

magnesium

iodine

nitrogen

How many valence electrons to strontium atoms generally lose?

0

2

3

1

Match the following electronegativities to their respective atoms.

Draggable item		Corresponding Item
Aluminum		3.0
Helium		2.2
Lithium		1.5
Arsenic		1.0
Hydrogen		N/A
Nitrogen		2.1

The melting points of ionic compounds are higher than the melting points of molecular compounds because

attractive forces between ions are stronger than the attractive forces between molecules

none of the above

Ionic substances are all flammable

ionic compounds are brittle

Which of the properties listed below is NOT a property of ionic compounds?

hardness

low melting point

brittle

high melting point

The electrons involved in the formation of a chemical bond are called

Lewis electrons

valence electrons

dipoles

s block electrons

Metallic Bonds have all the following characteristics, except

good conductor of electricity 

high conductor of heat

malleable

low melting point

Match the element with its correct Lewis Dot Structure for covalent bonding

Draggable item		Corresponding Item
Fluorine (F)		4 dots
Carbon (C)		3 dots
Boron (B)		7 dots

Match the number of covalent bonds with the appropriate element

Draggable item		Corresponding Item
2 covalent bonds		Hydrogen (H)
3 covalent bonds		Oxygen (O)
1 covalent bond		Nitrogen (N)

What is the defining characteristic of a covalent bond?

Transfer of electrons from one atom to another

The attraction of opposite charges

Caused by the attraction of protons and electrons

Sharing of electron pairs between atoms

In a water molecule (H2O), what type of bond is between the Hydrogen and Oxygen atoms?

Van der Waals  Bond

Metallic Bond

Covalent Bond

Ionic Bond

Which of these compounds does NOT form a covalent bond?

O2

NaCl

H2O

CH4

Covalent bonds can only occur between atoms of the same element.

True

False

In a covalent bond, the atom with the higher electronegativity completely takes the electrons from the other atom.

True

False

If oxygen has an electronegativity of 3.5 and hydrogen has an electronegativity of 2.1, what is the difference in electronegativity?

Using the Pauling scale, sodium (Na) has an electronegativity of 0.93, whereas chlorine (Cl) has an electronegativity of 3.16. What is the difference?

Carbon (electronegativity - 2.55) forms a covalent compound with hydrogen (electronegativity - 2.1). Calculate the difference in electronegativity.

Using the Octet Rule and the electron configuration of each element, select all of the the answers that explain what the elements need to do in order to achieve stability.

the metal will gain two electrons

each non-metal will lose one electron

both elements need to have 8 valence electrons in their outer shell

each non-metal will gain at least one electron

each metal will lose at least one electron

each non-metal will gain two electrons

Show the Ionic compound formation equation for Li and Cl.

_______ and _______ form an ion.

Match the following metals to form alloys.

Draggable item		Corresponding Item
copper		carbon
tin		zinc
iron		copper

Why are metals shiny?

electrons immediately emit photons and return to a lower energy level

a plane of atoms can slide past another without breaking bonds

electrons move more quickly

the valence electrons are delocalized, or free to roam about

Malleability and ductility are characteristics of substances with 

ionic bonds

metallic bonds

covalent bonds

polyatomic ions

Which of the following atom's Lewis dot notation shows six valence electrons?

sulfur

magnesium

iodine

nitrogen

How many valence electrons to strontium atoms generally lose?

0

2

3

1

Match the following electronegativities to their respective atoms.

Aluminum

3.0

Helium

2.2

Lithium

1.5

Arsenic

1.0

Hydrogen

N/A

Nitrogen

2.1

The melting points of ionic compounds are higher than the melting points of molecular compounds because

attractive forces between ions are stronger than the attractive forces between molecules

none of the above

Ionic substances are all flammable

ionic compounds are brittle

Which of the properties listed below is NOT a property of ionic compounds?

hardness

low melting point

brittle

high melting point

The electrons involved in the formation of a chemical bond are called

Lewis electrons

valence electrons

dipoles

s block electrons

Which of the pairs of elements below will form the LEAST polar bond?

Li and S

O and F

Na and Cl

Cl and H

Based on the table, which of the following statements is true?

The END has no affect on the type of bond formed between two atoms

When the END is greater than 1.7 atoms form a covalent bond

If the END between two atoms is 0.2, the bond between the two atoms will be polar

As the END increases, the polarity of the bond increases

Metallic Bonds have all the following characteristics, except

good conductor of electricity 

high conductor of heat

malleable

low melting point

Match the element with its correct Lewis Dot Structure for covalent bonding

Fluorine (F)

4 dots

Carbon (C)

3 dots

Boron (B)

7 dots

Match the number of covalent bonds with the appropriate element

2 covalent bonds

Hydrogen (H)

3 covalent bonds

Oxygen (O)

1 covalent bond

Nitrogen (N)

What is the defining characteristic of a covalent bond?

Transfer of electrons from one atom to another

The attraction of opposite charges

Caused by the attraction of protons and electrons

Sharing of electron pairs between atoms

In a water molecule (H2O), what type of bond is between the Hydrogen and Oxygen atoms?

Van der Waals  Bond

Metallic Bond

Covalent Bond

Ionic Bond

Which of these compounds does NOT form a covalent bond?

O2

NaCl

H2O

CH4

Covalent bonds can only occur between atoms of the same element.

True

False

In a covalent bond, the atom with the higher electronegativity completely takes the electrons from the other atom.

True

False

Using the Octet Rule and the electron configuration of each element, select all of the the answers that explain what the elements need to do in order to achieve stability. 

the metal will gain two electrons

each non-metal will lose one electron

both elements need to have 8 valence electrons in their outer shell

each non-metal will gain at least one electron

each metal will lose at least one electron

each non-metal will gain two electrons

Match the following metals to form alloys.

copper

carbon

tin

zinc

iron

copper

Why are metals shiny?

electrons immediately emit photons and return to a lower energy level

a plane of atoms can slide past another without breaking bonds

electrons move more quickly

the valence electrons are delocalized, or free to roam about

Which of the pairs of elements below will form the LEAST polar bond?

Li and S

O and F

Na and Cl

Cl and H

Based on the table, which of the following statements is true?

The END has no affect on the type of bond formed between two atoms

When the END is greater than 1.7 atoms form a covalent bond

If the END between two atoms is 0.2, the bond between the two atoms will be polar

As the END increases, the polarity of the bond increases