Assertion: actinium's isotope | /r/CapableOf | vary in their number of neutrons
Facets:
Source sentences:
text: While all forms of an element have the same number of protons, isotopes vary in their number of neutrons.
text: While all forms of an element have the same number of protons, isotopes vary in their number of neutrons.
text: While all forms of an element have the same number of protons, isotopes vary in their number of neutrons.
text: While all forms of an element have the same number of protons, isotopes vary in their number of neutrons.