Assertion: series's period | /r/CapableOf | fill atomic energy sublevels
Facets:
value: successively
type: MANNER
Source sentences:
text: The atomic number of each element increases than the element preceds it in the same period by whole one , Each period begins by filling a new energy level with one electron , then filling the atomic energy sublevels lying in the same period successively , until we reach the last element in the period which is a noble gas that has completely filled energy levels .