Assertion: period's element | /r/HasProperty | one of the chemical elements
Facets:
value: with atomic numbers
type: OTHER
value: a period
type: TEMPORAL
Source sentences:
text: A period 4 element is one of the chemical elements in the fourth row (or period) of the periodic table of the elements.
text: Transactinide elements (also, transactinides, or super-heavy elements) are the chemical elements with atomic numbers greater than those of the actinides, the heaviest of which is lawrencium (103).
text: A period 1 element is one of the chemical elements in the first row (or period) of the periodic table of the chemical elements.
text: A period 2 element is one of the chemical elements in the second row (or period) of the periodic table of the chemical elements.