Assertion: electron's atom | /r/HasProperty | indivisible
Facets:
value: until the 20th century
type: TEMPORAL
value: until this discovery
type: TEMPORAL
Source sentences:
text: Until the 20th century, people believed that atoms are indivisible, but the 20th century physicists discovered that the atom can be broken into smaller pieces, and all atoms are made of different compositions.
text: Until this discovery, the atom was considered an indivisible particle.
text: Atoms are thought to be indivisible until the 20th century.