Assertion: hydrogen atom's nucleus | /r/HasProperty | expected
Facets:
value: from being made of hydrogen nuclei
type: CAUSE
Source sentences:
text: It had been immediately apparent from the work of Moseley that the nuclei of heavy atoms have more than twice as much mass as would be expected from their being made of hydrogen nuclei, and thus there was required a hypothesis for the neutralization of the extra protons presumed present in all heavy nuclei.