Ionization Energy

Front

What is ionization energy?

Back

The energy required to remove an electron from an atom or ion in the gas phase.

Front

What is the trend of ionization energy across a period?

Back

Ionization energy increases across a period due to increasing nuclear charge.

Front

What is the trend of ionization energy down a group?

Back

Ionization energy decreases down a group due to increased electron shielding.

Front

What is the significance of electron shielding in ionization energy?

Back

Electron shielding reduces the effective nuclear charge felt by valence electrons, making them easier to remove.

Front

What is the relationship between ionization energy and atomic size?

Back

As atomic size increases, ionization energy generally decreases because valence electrons are further from the nucleus.

Front

What are the exceptions to the ionization energy trend?

Back

Exceptions occur in Groups 2, 3, 5, and 6 due to electron configurations.

Front

How does Coulomb's Law relate to ionization energy?

Back

Coulomb's Law explains that the force of attraction between the nucleus and electrons affects ionization energy.

Front

What is the first ionization energy?

Back

The energy required to remove the first electron from a neutral atom.

Front

What is the second ionization energy?

Back

The energy required to remove the second electron from a positively charged ion.

Front

How do ionization energies help determine an element's group?

Back

Large jumps in ionization energy values indicate the removal of core electrons, suggesting the element's group.