Chemistry — Ionisation Energy (Period 3)

{
  "$schema": "https://vega.github.io/schema/vega-lite/v5.json",
  "description": "First ionisation energy across period 3",
  "data": {"values": [
    {"element":"Na","ie":496},
    {"element":"Mg","ie":738},
    {"element":"Al","ie":578},
    {"element":"Si","ie":786},
    {"element":"P","ie":1012},
    {"element":"S","ie":1000},
    {"element":"Cl","ie":1251},
    {"element":"Ar","ie":1521}
  ]},
  "mark": {"type":"line","point":true},
  "encoding": {
    "x": {"field":"element","type":"nominal","sort":null,"title":"Element (period 3)"},
    "y": {"field":"ie","type":"quantitative","title":"first IE (kJ/mol)"}
  }
}