Question

value: 3 in the case of ___ covalent bonds, the electron pair in a bond is pulled more closely towards one atom than the other. in other words, the electrons are shared unevenly. this occurs because one atom is more electronegative (has a stronger electrostatic attractive force) than the other.
a. polar
b. nonpolar
c. ionic
d. metallic

Explanation:

To solve this, we analyze each option:

• Option a: Polar covalent bonds involve unequal sharing of electrons because of differing electronegativities of atoms, where the electron pair is pulled more towards the more electronegative atom.
• Option b: Nonpolar covalent bonds have equal sharing of electrons as atoms have similar electronegativities.
• Option c: Ionic bonds involve transfer of electrons, not sharing.
• Option d: Metallic bonds involve a sea of delocalized electrons, not sharing between two specific atoms.

So the correct option is a as it matches the description of unequal electron sharing in covalent bonds due to electronegativity difference.

Answer:

a. polar