Assertion: actinium's number | /r/HasProperty | given
Facets:
Source sentences:
text: Total number of protons in the nucleus is called the atomic number of the atom and is given the symbol Z.
text: Total number of protons in the nucleus is called the atomic number of the atom and is given the symbol Z.
text: The total number of neutrons in the nucleus of an atom is called the neutron number of the atom and is given the symbol N. Neutron number plus atomic number equals atomic mass number: N+Z