Assertion: electron's atom | /r/HasProperty | broken into smaller pieces
Facets:
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: But the 20th century physicist discovered that the atom can be broken into smaller pieces, and all the atoms are made of different compositions of these particles.