Alkaline-earth metals :-- Strontium and barium

Family tree for alkaline-earth metals :-- strontium and barium

    graph LR
    A["<a href='/classifications/hs/v1996/28'>28: Inorgn chem; compds of prec mtl,  radioact elements etc</a>"]
A --> B["<a href='/classifications/hs/v1996/2805'>2805: Alkali or alkaline-earth metals; rare-earth metals, scandium and yttrium, whether or not intermixed or interalloyed; mercury.</a>"]
B --> C["<a href='/classifications/hs/v1996/280522'>280522: Alkaline-earth metals :-- Strontium and barium</a>"]

    B --> D["<a href='/classifications/hs/v1996/280511'>280511: Alkali metals :-- Sodium</a>"]
B --> E["<a href='/classifications/hs/v1996/280519'>280519: Alkali metals :-- Other</a>"]
B --> F["<a href='/classifications/hs/v1996/280521'>280521: Alkaline-earth metals :-- Calcium</a>"]
B --> G["<a href='/classifications/hs/v1996/280530'>280530: Rare-earth metals, scandium and yttrium, whether or not intermixed or interalloyed</a>"]
B --> H["<a href='/classifications/hs/v1996/280540'>280540: Mercury</a>"]

    

    %% Color coordination by level

    classDef level1 color:#000,fill:#a8f9ff,stroke:#333,stroke-width:2px
    classDef level2 color:#000,fill:#e0a458,stroke:#333,stroke-width:1px
    classDef level3 color:#000,fill:#419d78,stroke:#333,stroke-width:1px
    classDef level4 color:#000,fill:#c04abc,stroke:#333,stroke-width:1px
    classDef level5 color:#000,fill:#f1c40f,stroke:#333,stroke-width:1px
    classDef level6 color:#000,fill:#f1c40f,stroke:#333,stroke-width:1px
    classDef highlight color:#000,fill:#fff,stroke:#000,stroke-width:5px



  %% Apply classes
  class A level2
class B level4
class C level6
class D level6
class E level6
class F level6
class G level6
class H level6

  class C highlight

  %% class A level1
  %% class B,C level2
  %% class D,E,F,G,H,I level2
  %% class J,K,L,M,N,O,P level3
  %% class C highlight