Assertion: actinium | /r/HasProperty | obtained as artificial element
Facets:
value: by the irradiation of radium
type: MANNER
Source sentences:
text: Actinium is found in extremely low concentrations in uranium ores; but actinium can be obtained also as an artificial element by the irradiation of radium:
text: Actinium is found in extremely low concentrations in uranium ores; but actinium can be obtained also as an artificial element by the irradiation of radium: 226Ra(n,gamma)227Ac.
text: Actinium is found in extremely low concentrations in uranium ores; but actinium can be obtained also as an artificial element by the irradiation of radium: 226Ra(n,gamma)227Ac.