Statements (24)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
gptkb:chemical_compound
|
| gptkbp:alsoKnownAs |
gptkb:alkaline_earth_metals
|
| gptkbp:characteristic |
less reactive than alkali metals
form +2 cations shiny, silvery-white metals two valence electrons react with water (except beryllium) |
| gptkbp:containsElement |
gptkb:radium
gptkb:strontium calcium magnesium beryllium barium |
| gptkbp:discoveredBy |
various chemists (elements discovered separately)
|
| https://www.w3.org/2000/01/rdf-schema#label |
Group 2A
|
| gptkbp:periodicTableGroup |
s-block
|
| gptkbp:positionInPeriodicTable |
second column
|
| gptkbp:relatedGroup |
2
|
| gptkbp:uses |
barium in X-ray imaging
calcium in cement and bones magnesium in alloys radium in cancer treatment (historically) |
| gptkbp:bfsParent |
gptkb:IARC_Monographs_classification_system
|
| gptkbp:bfsLayer |
7
|