U2S1 Obj C + Obj D

What is electronegativity, and how does it affect the sharing of electrons in a bond?

• Electronegativity is an atom's ability to attract shared electrons. Higher electronegativity causes unequal sharing, resulting in a polar bond.
• Electronegativity is an atom’s mass. Higher electronegativity makes atoms larger.
• Electronegativity is how much an atom repels electrons.
• Electronegativity is the number of electrons in the outer shell.

What type of bond would Cl2 form: Polar or Nonpolar? Explain why.

• Polar bond because chlorine has a very high electronegativity
• Nonpolar bond because both chlorines will have the same electronegativity so they will share the electrons evenly.
• Polar bond because it contains two of the same atom
• Nonpolar bond because chlorine has a low electronegativity

Draw the structural model for a water molecule (H2O). Label the partial charges and dipole.

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How can you use the periodic table to predict the electronegativity of an element?

• Electronegativity increases across a period (left to right) and decreases down a group (top to bottom). The closer to F, the more electronegative.
• Electronegativity increases down a group and decreases across a period
• The periodic table cannot be used to predict electronegativity
• Electronegativity stays the same for all elements

How does electronegativity explain the difference between polar and nonpolar covalent bonds?

• Polar bonds have equal sharing due to electronegativity differences, while nonpolar bonds share electrons unequally.
• Nonpolar bonds always contain ionic character.
• Polar bonds have unequal sharing due to electronegativity differences, while nonpolar bonds share electrons equally.
• Electronegativity only applies to metals.

Which element is the most electronegative element?

• Oxygen
• Chlorine
• Fluorine
• Hydrogen

Compare the bond polarity in H-F and F-F. Which is polar?

• H-F is polar because of the electronegativity difference; F-F is nonpolar because both atoms share electrons equally.
• Both bonds are nonpolar because they are covalent.
• F-F is polar because fluorine is highly reactive.
• H-F is nonpolar because it is a hydrogen bond.

How can you predict the direction of a bond dipole using electronegativity?

• The dipole points toward the more electronegative atom.
• The dipole points toward the less electronegative atom.
• The dipole does not depend on electronegativity.
• Dipoles only occur in ionic compounds.

Draw the structural model for a Hydrochloric molecule (HCl). Label the partial charges and dipole.

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Draw a model of O – Te bond. Label the partial charges and dipole.

• Correct drawing
• Incorrect drawing 1
• Incorrect drawing 2