Ionization Energy Trends and Concepts

The video explores periodic trends in ionization energy, focusing on the increase across a period due to effective nuclear charge. It explains the concept of effective nuclear charge and its calculation, using lithium and beryllium as examples. The video also discusses anomalies in ionization energy trends, such as the decrease from beryllium to boron and nitrogen to oxygen, attributed to electron configurations and repulsion effects. The analysis includes electron configurations for elements like boron, carbon, nitrogen, and oxygen, highlighting their impact on ionization energy.

What is the general trend in ionization energy as you move across a period in the periodic table?

• It fluctuates randomly.

• It increases.

• It decreases.

• It remains constant.

What is the formula for calculating the effective nuclear charge?

• Z - S

• Z + S

• Z * S

• Z / S

Why does beryllium have a higher ionization energy than lithium?

• Beryllium has fewer protons.

• Beryllium has more inner electrons.

• Beryllium has a higher effective nuclear charge.

• Beryllium has a larger atomic radius.

What causes the slight decrease in ionization energy from beryllium to boron?

• Decrease in electron repulsion.

• Extra shielding by 2s electrons.

• Decrease in effective nuclear charge.

• Increase in atomic size.

Which electron configuration change explains the decrease in ionization energy from nitrogen to oxygen?

• Addition of an electron to a new shell.

• Addition of an electron to an already occupied orbital.

• Removal of an electron from a full orbital.

• No change in electron configuration.

What is the ionization energy trend from boron to carbon?

• It decreases.

• It remains constant.

• It fluctuates.

• It increases.

What is the ionization energy trend from carbon to nitrogen?

• It decreases.

• It remains constant.

• It increases.

• It fluctuates.

What is the ionization energy trend from nitrogen to oxygen?

• It decreases.

• It remains constant.

• It increases.

• It fluctuates.

What is the ionization energy of fluorine compared to oxygen?

• Equal to oxygen.

• Unrelated to oxygen.

• Lower than oxygen.

• Higher than oxygen.

What is the main reason for the increase in ionization energy from fluorine to neon?

• Decrease in atomic size.

• Increase in effective nuclear charge.

• Decrease in electron repulsion.

• Increase in atomic mass.