Chemistry — Reactivity Series

{
  "$schema": "https://vega.github.io/schema/vega-lite/v5.json",
  "description": "Reactivity of selected metals",
  "data": {"values": [
    {"metal":"K","reactivity":10},
    {"metal":"Na","reactivity":9},
    {"metal":"Ca","reactivity":8},
    {"metal":"Mg","reactivity":6},
    {"metal":"Zn","reactivity":4},
    {"metal":"Fe","reactivity":3},
    {"metal":"Cu","reactivity":1}
  ]},
  "mark": "bar",
  "encoding": {
    "y": {"field":"metal","type":"nominal","sort":"-x","title":"Metal"},
    "x": {"field":"reactivity","type":"quantitative","title":"Relative reactivity"},
    "color": {"field":"metal","type":"nominal","legend":null}
  }
}