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Questions and Answers
The electronegativity value for a polar covalent bond ranges from 0.0 to 0.4.
The electronegativity value for a polar covalent bond ranges from 0.0 to 0.4.
False (B)
An ionic bond can be identified with an electronegativity value of 2.4 to 4.0.
An ionic bond can be identified with an electronegativity value of 2.4 to 4.0.
True (A)
Covalent compounds generally exhibit high melting and boiling points.
Covalent compounds generally exhibit high melting and boiling points.
False (B)
The electronegativity value helps to classify the type of bond formed between two atoms.
The electronegativity value helps to classify the type of bond formed between two atoms.
Metallic bonding is characterized by the presence of localized electron pairs.
Metallic bonding is characterized by the presence of localized electron pairs.
A large difference in electronegativity values between two atoms in a bond creates a nonpolar bond.
A large difference in electronegativity values between two atoms in a bond creates a nonpolar bond.
Ionic compounds typically have high melting and boiling points due to the strong attractions between charged ions.
Ionic compounds typically have high melting and boiling points due to the strong attractions between charged ions.
Covalent bonds are characterized by the sharing of electrons between atoms with similar electronegativities.
Covalent bonds are characterized by the sharing of electrons between atoms with similar electronegativities.
In metallic bonding, atoms lose electrons to form a 'sea' of delocalized electrons, which accounts for the conductivity of metals.
In metallic bonding, atoms lose electrons to form a 'sea' of delocalized electrons, which accounts for the conductivity of metals.
The strength of covalent bonds is generally weaker than that of ionic bonds.
The strength of covalent bonds is generally weaker than that of ionic bonds.
A greater difference in electronegativity between two atoms indicates a stronger ionic bond.
A greater difference in electronegativity between two atoms indicates a stronger ionic bond.
Electronegativity values for nonpolar covalent bonds typically range from 0.6 to 1.2.
Electronegativity values for nonpolar covalent bonds typically range from 0.6 to 1.2.
The pull for electrons is stronger when the electronegative atoms have values over 1.8.
The pull for electrons is stronger when the electronegative atoms have values over 1.8.
Metallic bonds are characterized by delocalized electrons that contribute to electrical conductivity.
Metallic bonds are characterized by delocalized electrons that contribute to electrical conductivity.
Covalent bonds formed between atoms with electronegativity differences of less than 0.4 are considered ionic.
Covalent bonds formed between atoms with electronegativity differences of less than 0.4 are considered ionic.
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Study Notes
Bond Type and Electronegativity
- The presence of a bond between two elements can be determined by calculating the electronegativity value between two atoms.
- A polar covalent bond has an electronegativity value between 0.5 and 1.9.
- A non-polar covalent bond has an electronegativity value between 0 and 0.4.
- An ionic bond has an electronegativity value between 2.4 and 4.0.
Properties of Covalent Compounds
- Covalent compounds have low melting and boiling points.
- Large differences in electronegativity between bonded atoms increase the polarity of the bond.
- More electronegative atoms have a stronger pull for electrons.
- The electronegativity difference (∆EN) between atoms in a covalent bond is greater than zero and less than 1.8.
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