Assertion: metal's electron | /r/HasProperty | arranged in the electron configuration
Facets:
Source sentences:
text: A calcium atom has twenty electrons, arranged in the electron configuration [Ar]4s2.
text: The 65 electrons of a terbium atom are arranged in the electron configuration [Xe]4f96s2; normally, only three electrons can be removed before the nuclear charge becomes too great to allow further ionization, but in the case of terbium, the stability of the half-filled [Xe]4f7 configuration allows further ionization of a fourth electron in the presence of very strong oxidizing agents such as fluorine gas.