What is Period 7 element?
A '''period 7 element''' is an [[Chemical element|element]] in the seventh [[period (periodic table)|period]] (row) of the [[periodic table]]. It contains 32 elements, beginning at [[francium]] and ending with [[oganesson]]. The [[Actinides]] are part of this period. They are all really radioactive. As of 2016, period 7 elements are the last period of elements that have been made.<ref>{{Cite web|last=Krämer|first=Katrina|date=2016-01-28|title=Beyond element 118: the next row of the periodic table|url=https://www.chemistryworld.com/news/beyond-element-118-the-next-row-of-the-periodic-table/9400.article|access-date=2021-04-18|website=Chemistry World|language=en}}</ref> Period 7 elements have [[electrons]] in the first seven [[electron shell]]s. All period 7 elements have one or more electrons in the seventh electron shell ([[valence electrons]]). When atomic number increases by one, another electron is added. Two electrons join the 7s [[atomic orbital|orbital]], 14 electrons join the 5f orbital, ten electrons join the 6d orbital, and six electrons join the 7p orbitals. ==References== {{reflist}} {{Periodic tables footer}} {{chem-stub}} [[Category:Periodic table]]