Statements (16)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
chemical classification
|
| gptkbp:consistsOf |
groups of three elements
|
| gptkbp:exampleTriad |
calcium, strontium, barium
chlorine, bromine, iodine lithium, sodium, potassium |
| https://www.w3.org/2000/01/rdf-schema#label |
Dobereiner's triads
|
| gptkbp:influenced |
development of periodic law
|
| gptkbp:limitation |
not all elements could be grouped into triads
|
| gptkbp:observedBy |
atomic mass of middle element is approximately the average of the other two
|
| gptkbp:proposedBy |
gptkb:Johann_Wolfgang_Döbereiner
|
| gptkbp:relatedGroup |
atomic mass
similar chemical properties |
| gptkbp:relatedTo |
gptkb:chemical_compound
|
| gptkbp:yearProposed |
1817
|
| gptkbp:bfsParent |
gptkb:Law_of_Octaves
|
| gptkbp:bfsLayer |
7
|