Gr 11 Physical Sciences: Ch 3.3 Electronegativity
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Questions and Answers

What is electronegativity?

  • The ability of an atom to release electrons
  • The ability of an atom to attract electrons towards itself (correct)
  • The ability of an atom to form ionic bonds
  • The ability of an atom to form covalent bonds

    • Why is understanding electronegativity important in chemistry?

  • To identify the noble gases
  • To predict the color of molecules
  • To predict molecular behavior in chemical reactions (correct)
  • To determine the atomic mass of elements

    • Who introduced the concept of electronegativity in 1932?

  • Linus Pauling (correct)
  • Albert Einstein
  • Niels Bohr
  • Marie Curie

    • What do higher electronegativity values indicate?

    <p>A stronger ability to attract electrons</p> Signup and view all the answers

    How do you calculate the electronegativity difference between two atoms?

    <p>Subtract the smaller value from the larger value</p> Signup and view all the answers

    What type of bond is formed when the electronegativity difference is between 0.1 and 1?

    <p>Weak Polar Covalent Bond</p> Signup and view all the answers

    What type of bond is formed when the electronegativity difference is greater than 2.1?

    <p>Ionic Bond</p> Signup and view all the answers

    What is the range of electronegativity values for elements (except noble gases)?

    <p>Between 0 and 4</p> Signup and view all the answers

    What type of bond forms between two identical non-metal atoms?

    <p>Non-polar covalent bond</p> Signup and view all the answers

    What is the primary reason for the formation of polar covalent bonds?

    <p>Different electronegativity of atoms</p> Signup and view all the answers

    What determines the polarity of a molecule?

    <p>Shape of the molecule and electronegativity differences</p> Signup and view all the answers

    What is the primary characteristic of a polar molecule?

    <p>Uneven distribution of charges</p> Signup and view all the answers

    What theory is used to determine the molecular geometry of a molecule?

    <p>VSEPR theory</p> Signup and view all the answers

    What is the primary reason for the higher melting and boiling points of polar molecules?

    <p>Stronger intermolecular forces</p> Signup and view all the answers

    What type of solvent is suitable for dissolving polar molecules?

    <p>Polar solvents</p> Signup and view all the answers

    What is the relationship between electronegativity and molecular properties?

    <p>Electronegativity influences bond type and molecular properties</p> Signup and view all the answers

    What is the primary purpose of understanding electronegativity values?

    <p>To predict the type of bonds formed between atoms</p> Signup and view all the answers

    Which type of bond is formed when the electronegativity difference is 0?

    <p>Non-Polar Covalent Bond</p> Signup and view all the answers

    What is the electronegativity difference range for forming a strong polar covalent bond?

    <p>Between 1.1 and 2</p> Signup and view all the answers

    What is the chemical property that describes the ability of an atom to attract electrons towards itself?

    <p>Electronegativity</p> Signup and view all the answers

    Why do atoms with higher electronegativity values attract electrons more strongly?

    <p>Because they have a greater ability to attract electrons</p> Signup and view all the answers

    What is the result of a large electronegativity difference between two atoms?

    <p>Formation of an ionic bond</p> Signup and view all the answers

    Which of the following is NOT a factor influenced by electronegativity?

    <p>Atomic mass</p> Signup and view all the answers

    What is the range of electronegativity values for noble gases?

    <p>Not applicable</p> Signup and view all the answers

    Which type of covalent bond is formed between two different non-metal atoms?

    <p>Polar covalent bond</p> Signup and view all the answers

    What is responsible for the partial charges in a polar covalent bond?

    <p>Electronegativity difference</p> Signup and view all the answers

    Which of the following molecules is likely to be polar?

    <p>H2O</p> Signup and view all the answers

    What determines the solubility of a molecule?

    <p>Molecular polarity</p> Signup and view all the answers

    Why do polar molecules generally have higher melting and boiling points?

    <p>Stronger intermolecular forces</p> Signup and view all the answers

    What is the relationship between molecular polarity and its physical properties?

    <p>Molecular polarity affects physical properties such as solubility and melting points</p> Signup and view all the answers

    Which of the following is a characteristic of a non-polar molecule?

    <p>Even distribution of charges</p> Signup and view all the answers

    How does the shape of a molecule affect its polarity?

    <p>A symmetrical shape can cancel out any dipole moments, making the molecule non-polar</p> Signup and view all the answers

    What is the primary reason why electronegativity is crucial in determining the nature of bonds between atoms?

    <p>It determines the polarity of molecules</p> Signup and view all the answers

    Which of the following statements is true regarding electronegativity values?

    <p>Elements with higher electronegativity values attract electrons more strongly</p> Signup and view all the answers

    What is the result of a large electronegativity difference between two atoms in a molecule?

    <p>Formation of an ionic bond</p> Signup and view all the answers

    Which of the following types of bonds is typically formed between two atoms with a small electronegativity difference?

    <p>Non-polar covalent bond</p> Signup and view all the answers

    What is the primary factor that determines the polarity of a molecule?

    <p>Electronegativity difference between atoms</p> Signup and view all the answers

    Which of the following physical properties is most directly affected by electronegativity?

    <p>Melting point</p> Signup and view all the answers

    What is the primary reason why atoms with higher electronegativity values attract electrons more strongly?

    <p>They have a stronger nuclear attraction</p> Signup and view all the answers

    Which of the following molecules is likely to have a high electronegativity difference between its atoms?

    <p>NaCl</p> Signup and view all the answers

    What is the primary reason for the formation of non-polar covalent bonds?

    <p>The atoms involved are identical non-metal atoms</p> Signup and view all the answers

    Which of the following molecules is likely to have a higher melting point?

    <p>A molecule with a asymmetrical shape and polar bonds</p> Signup and view all the answers

    What is the primary factor that determines the polarity of a molecule?

    <p>The electronegativity difference between atoms in a bond</p> Signup and view all the answers

    Which of the following is a characteristic of a polar covalent bond?

    <p>Unequal sharing of electrons</p> Signup and view all the answers

    What is the primary reason for the solubility of a molecule in a particular solvent?

    <p>The polarity of the molecule</p> Signup and view all the answers

    What is the primary factor that determines the overall polarity of a molecule?

    <p>The molecular shape and the distribution of charges</p> Signup and view all the answers

    Which of the following molecules is likely to be non-polar?

    <p>A molecule with a symmetrical shape and non-polar bonds</p> Signup and view all the answers

    What is the primary reason for the stronger intermolecular forces in polar molecules?

    <p>The presence of hydrogen bonding</p> Signup and view all the answers

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