Chemistry — Periodic Trends

digraph Trends {
  node [shape=box, style=rounded];
  "Across a period ->" -> "Atomic radius decreases";
  "Across a period ->" -> "Ionisation energy increases";
  "Across a period ->" -> "Electronegativity increases";
  "Down a group ->" -> "Atomic radius increases";
  "Down a group ->" -> "Ionisation energy decreases";
  "Down a group ->" -> "Metallic character increases";
}