Bond Lengths and Energies in Chemistry

Mr. Anderson's video on bond length and bond energy explores the forces between atoms, including attraction and repulsion, and how these forces determine bond length and energy. The video highlights Cathleen Lonsdale's contributions to crystallography and explains the concept of the Goldilocks zone in atomic bonding. It also covers how bond strength and length are affected by the number of shared electrons, using examples like boron, arenium, ethane, and acetylene.

Who was the scientist known for measuring some of the first bond lengths?

• Rosalind Franklin

• Dorothy Hodgkin

• Cathleen Lonsdale

• Marie Curie

What causes the attraction between two atoms?

• Electrons of one atom attracting the protons of another

• Electrons of one atom attracting the electrons of another

• Protons of one atom attracting the protons of another

• Neutrons of one atom attracting the neutrons of another

What is bond energy?

• The energy absorbed when atoms are close together

• The energy released when atoms are far apart

• The energy required to break a bond

• The energy required to form a bond

What happens to bond length as bond strength increases?

• Bond length increases

• Bond length decreases

• Bond length fluctuates

• Bond length remains the same

How does the atomic radius of boron affect its bond length?

• It makes the bond length shorter than expected

• It has no effect on bond length

• It makes the bond length longer than expected

• It doubles the bond length

What is the bond length of arenium if its atomic radius is 137.5 pm?

• 150 pm

• 300 pm

• 275 pm

• 137.5 pm

How does a triple bond affect the bond length compared to a single bond?

• Triple bond increases bond length

• Triple bond decreases bond length

• Triple bond has no effect on bond length

• Triple bond doubles the bond length

Which molecule has a triple bond between carbon atoms?

• Ethane

• Methane

• Acetylene

• Propane

What happens to bond energy as the number of bonds increases?

• Bond energy fluctuates

• Bond energy remains constant

• Bond energy increases

• Bond energy decreases

What is the relationship between bond length and bond energy?

• Shorter bond length means higher bond energy

• Shorter bond length means lower bond energy

• Longer bond length means higher bond energy

• Bond length and energy are unrelated