Assertion: lithium | /r/AtLocation | solar system
Facets:
value: because of its relative nuclear instability
type: CAUSE
Source sentences:
text: Because of its relative nuclear instability, lithium is less common in the solar system than 25 of the first 32 chemical elements even though its nuclei are very light: it is an exception to the trend that heavier nuclei are less common.
text: As a result of this, though very light in atomic weight, lithium is less common in the Solar System than 25 of the first 32 chemical elements.