Learning Modules 25-26

Front

What type of bonds are found in acetylene (C2H2)?

Back

Acetylene (C2H2) contains one σ (sigma) bond between the carbon atoms and two π (pi) bonds, making a triple bond between the carbon atoms.

Front

What is the magnetic property of O2?

Back

O2 is magnetic because it has unpaired electrons in its molecular orbitals.

Front

How does bond order (B.O.) relate to bond energy and bond length?

Back

Higher bond order indicates stronger bonds (higher bond energy) and shorter bond lengths. For example, N≡N has the highest bond order (3), thus the highest energy and shortest length.

Front

What is a radical in chemistry?

Back

A radical is a species that has an unpaired electron, typically resulting from an odd number of total electrons.

Front

Which bond does not exist due to a molecular orbital (MO) energy of 0?

Back

He2 does not exist because its molecular orbital energy is 0, making it unstable.

Front

What is the bond order of a single bond?

Back

The bond order of a single bond is 1.

Front

How do you determine if a molecule is paramagnetic?

Back

A molecule is paramagnetic if it has unpaired electrons in its molecular orbitals.

Front

What is the significance of Lewis structures in identifying radicals?

Back

Lewis structures help visualize the arrangement of electrons, making it easier to identify radicals by counting the total number of electrons.

Front

What is the bond energy trend for B-B, C=C, and N≡N?

Back

The bond energy trend is B-B < C=C < N≡N, meaning N≡N has the highest bond energy.

Front

What is the relationship between bond length and bond strength?

Back

Generally, shorter bonds are stronger. Thus, triple bonds are shorter and stronger than double bonds, which are stronger than single bonds.