Periodic Trends in Chemistry

These flashcards cover key concepts and definitions related to periodic trends in chemistry, specifically focusing on ionization energy, electronegativity, atomic radius, and ionic radii.

Ionization Energy

The energy it takes to remove an electron from an atom, usually a valence electron in the outermost orbital.

Periodic Trend of Ionization Energy

Ionization energy increases as you go from left to right across a period.

Group Trend of Ionization Energy

Ionization energy decreases as you go down a group.

Electronegativity

The tendency of an atom to attract electrons from a neighbouring atom.

Periodic Trend of Electronegativity

Electronegativity increases as you go from left to right across a period.

Group Trend of Electronegativity

Electronegativity decreases as you go down a group.

Atomic Radius

The radius of an atom, which is an indication of atomic size.

Periodic Trend of Atomic Radius

Atomic radius decreases as you go from left to right across a period.

Group Trend of Atomic Radius

Atomic radius increases as you go down a group.

Ionic Radii

(-) ions are larger than the corresponding neutral atom because they have more electrons; (+) ions are smaller than the corresponding neutral atom because they have less electrons.