Assertion: atom's center | /r/HasProperty | the nucleus
Facets:
Source sentences:
text: The center of an atom is the nucleus and one or more electrons surrounding the nucleus.
text: Protons and neutrons are in the center (nucleus) of the atom.
text: The center of an atom is the nucleus and one or more electrons surrounding the nucleus.
text: The center of an atom is the nucleus that contain protons and neutrons.