Understanding Potential Energy in Diatomic Molecules

The video explores potential energy as a function of internuclear distance in diatomic molecules, using molecular hydrogen, nitrogen, and oxygen as examples. It discusses how potential energy varies with internuclear distance and the factors influencing this, such as atomic radii and bond order. A worked example is provided to identify potential energy graphs for different diatomic molecules, emphasizing the role of bond energy and atomic size in determining internuclear distances.

What is the primary factor that determines the internuclear distance in diatomic molecules at standard temperature and pressure?

• The pressure of the environment

• The temperature of the environment

• The color of the atoms

• The size of the atoms

Which of the following is NOT a factor affecting the internuclear distance in diatomic molecules?

• Potential energy

• Color of the molecule

• Bond order

• Atomic size

How does bond order affect the bond energy in diatomic molecules?

• Higher bond order increases bond energy

• Higher bond order decreases bond energy

• Bond order only affects atomic size

• Bond order has no effect on bond energy

Which diatomic molecule is likely to have the highest bond energy based on bond order?

• Diatomic hydrogen (H2)

• Diatomic nitrogen (N2)

• Diatomic oxygen (O2)

• Diatomic fluorine (F2)

What is the bond order of diatomic nitrogen?

• Double bond

• Triple bond

• Single bond

• Quadruple bond

Which factor is most important in determining the internuclear distance for diatomic molecules?

• Bond order

• Color of the molecule

• Temperature

• Atomic mass

Which diatomic molecule is identified by the lowest bond energy in the potential energy graph?

• Diatomic fluorine (F2)

• Diatomic hydrogen (H2)

• Diatomic nitrogen (N2)

• Diatomic oxygen (O2)

What trend is observed in atomic radii as you move from left to right across a period in the periodic table?

• Atomic radii increase

• Atomic radii decrease

• Atomic radii remain constant

• Atomic radii fluctuate randomly

Which diatomic molecule is expected to have the shortest internuclear distance based on atomic size?

• Diatomic oxygen (O2)

• Diatomic nitrogen (N2)

• Diatomic hydrogen (H2)

• Diatomic chlorine (Cl2)

How does the addition of electrons to the same shell affect atomic radius?

• Causes atomic radius to fluctuate

• Increases atomic radius

• Decreases atomic radius

• Has no effect on atomic radius