Chemical Bonds - Covalent

What type of bond is formed when atoms share electrons?

• Covalent bond

• Hydrogen bond

• Metallic bond

• Ionic bond

In a covalent bond, how many electrons are shared between two atoms?

• 2

• 1

• 3

• 4

What is the term for a covalent bond where electrons are shared equally?

• Polar covalent bond

• Nonpolar covalent bond

• Metallic bond

• Ionic bond

Give an example of a molecule with a single covalent bond.

• Oxygen gas (O2)

• Carbon dioxide (CO2)

• Water (H2O)

• Hydrogen gas (H2)

What is the difference between a polar and nonpolar covalent bond?

• The difference between a polar and nonpolar covalent bond lies in the unequal sharing of electrons in polar bonds compared to equal sharing in nonpolar bonds.

• Polar bonds always involve a metal and a nonmetal

• Polar bonds have more ionic character than nonpolar bonds

• Nonpolar bonds involve the sharing of electrons between different elements

Explain the concept of electronegativity in covalent bonds.

• Electronegativity is the tendency of an atom to repel shared electrons in a covalent bond.

• Electronegativity is the tendency of an atom to attract a shared pair of electrons towards itself in a covalent bond.

• Electronegativity is the ability of an atom to lose electrons in a covalent bond.

• Electronegativity is the measure of the size of an atom in a covalent bond.

How does the number of shared electrons affect the strength of a covalent bond?

• Fewer shared electrons result in a stronger covalent bond.

• The number of shared electrons has no effect on the strength of a covalent bond.

• More shared electrons result in a stronger covalent bond.

• Shared electrons weaken the covalent bond.

What is a coordinate covalent bond?

• A coordinate covalent bond is a type of ionic bond.

• A coordinate covalent bond involves sharing electrons between two different atoms.

• A coordinate covalent bond is a type of covalent bond where both electrons come from the same atom.

• A coordinate covalent bond is always formed between two different elements.

Describe the formation of a double covalent bond.

• A double covalent bond involves the sharing of only one pair of electrons.

• Two atoms share three pairs of electrons to form a double covalent bond.

• Two atoms share two pairs of electrons to form a double covalent bond.

• A double covalent bond is formed by the transfer of electrons between two atoms.

What is a sigma bond in a covalent bond?

• A sigma bond involves electron sharing in a plane perpendicular to the internuclear axis.

• A sigma bond is formed by the overlap of p orbitals.

• A sigma bond is a type of covalent bond where the electron density is concentrated along the internuclear axis between two atoms.

• A sigma bond is weaker than a pi bond.