Multiple Choice
If a covalent bond is polar:
a) Electrons are not shared by atoms.
b) Protons are shared by atoms.
c) The bond is not important to living cells.
d) One of the atoms has a partial negative charge.
e) The bond is not a strong bond.
2. Chemistry
Covalent Bonds
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When one or more pairs of valence electrons are shared by two neutral atoms, what type of bond is formed?
A
An ionic bond
B
A hydrogen bond
C
An electronegative bond
D
A covalent bond
Verified step by step guidance1
Begin by understanding the concept of valence electrons. Valence electrons are the outermost electrons of an atom and are involved in forming bonds with other atoms.
Recognize that atoms can achieve stability by sharing, donating, or receiving electrons to complete their outer electron shells, often aiming for a configuration similar to noble gases.
Identify the types of chemical bonds: Ionic bonds involve the transfer of electrons from one atom to another, resulting in charged ions. Hydrogen bonds are weak attractions between a hydrogen atom and an electronegative atom. Covalent bonds involve the sharing of electron pairs between atoms.
Focus on covalent bonds, which occur when two atoms share one or more pairs of valence electrons. This sharing allows each atom to attain the electron configuration of a noble gas, leading to a stable molecule.
Conclude that when one or more pairs of valence electrons are shared between two neutral atoms, a covalent bond is formed. This type of bond is characterized by the mutual sharing of electrons, rather than the transfer or attraction seen in other types of bonds.
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