Periodic Table Trends
, Periodic Table Trends
• The Periodic Table is a tool Chemists use for
organising and remembering chemical facts.
• There is a repeating pattern of chemical and
physical properties when the elements are arranged
in order of increasing atomic number.
, Periodic Table Trends
• The periodic nature of the table arises from the
repeating patterns in the electron configuration of
the elements → specifically, the similarity of the
electron distribution in the valence orbitals.
Li: [He] 2s1
Na: [Ne] 3s1
K: [Ne] 4s1
, The Periodic Table
Our Goal: consider how some of the important
properties of elements change as we move across a
row or down a column of a periodic table
• Effective nuclear charge
• Sizes of atoms and ions
• Ionization energy
• Electron affinity
• Metals, metalloids and nonmetals (Self-Study)
, Periodic Table Trends
• The Periodic Table is a tool Chemists use for
organising and remembering chemical facts.
• There is a repeating pattern of chemical and
physical properties when the elements are arranged
in order of increasing atomic number.
, Periodic Table Trends
• The periodic nature of the table arises from the
repeating patterns in the electron configuration of
the elements → specifically, the similarity of the
electron distribution in the valence orbitals.
Li: [He] 2s1
Na: [Ne] 3s1
K: [Ne] 4s1
, The Periodic Table
Our Goal: consider how some of the important
properties of elements change as we move across a
row or down a column of a periodic table
• Effective nuclear charge
• Sizes of atoms and ions
• Ionization energy
• Electron affinity
• Metals, metalloids and nonmetals (Self-Study)
