electronegativity and chemical bonds

What is electronegativity?

• The ability of an atom to attract electrons in a chemical bond

• The ability of an atom to donate electrons in a chemical bond

• The number of protons in an atom

• The energy required to remove an electron from an atom

Which type of bond is formed between atoms with a large difference in electronegativity (greater than 1.7)?

• Metallic bond

• Covalent bond

• Ionic bond

• Hydrogen bond

What type of bond is formed when two atoms share electrons equally?

• Polar covalent bond

• Ionic bond

• Nonpolar covalent bond

• Metallic bond

What is a polar covalent bond?

• A bond where electrons are shared equally between atoms

• A bond where electrons are transferred from one atom to another

• A bond where electrons are shared unequally between atoms

• A bond that forms between atoms of the same element

Which element has the highest electronegativity?

• Hydrogen

• Oxygen

• Fluorine

• Sodium

What is the typical electronegativity difference that leads to the formation of an ionic bond?

• Less than 0.5

• Between 0.5 and 1.7

• Greater than 1.7

• Exactly 2.0

What is the electronegativity difference that typically leads to the formation of a nonpolar covalent bond?

• 0

• Less than 0.5

• Between 0.5 and 1.7

• Greater than 1.7

Which of the following pairs of elements is most likely to form an ionic bond?

• Carbon and Hydrogen

• Sodium and Chlorine

• Oxygen and Nitrogen

• Hydrogen and Oxygen

What happens to electrons in a polar covalent bond?

• They are shared equally between atoms

• They are transferred completely from one atom to another

• They are shared unequally, with the more electronegative atom attracting the electrons more

• They orbit only one of the atoms in the bond

Which of the following pairs is most likely to form a polar covalent bond?

• H and H

• Na and Cl

• H and Cl

• K and F