In Which of the following series all the elements are radioactive in nature
Answers
Period 7 elements are all radioactive in nature.
The actinides, which include plutonium, the naturally occurring element with the heaviest nucleus, are found during this time; succeeding elements must be synthesized artificially.
One of the chemical elements in the seventh row (or period) of the periodic table of the chemical elements is a period 7 element.
The periodic table is organized in rows to show repeating (periodic) patterns in the chemical behavior of elements as their atomic number increases: a new row is started when chemical activity begins to repeat, which means that elements with similar behavior are grouped together vertically.
Beginning with francium and concluding with oganesson, the heaviest element presently known, the seventh series comprises 32 elements, tying for the most with period 6.
Period 7 elements, on average, fill their 7s shells first, followed by their 5f, 6d, and 7p shells in that sequence, with certain outliers, such as uranium.