Seventh period is_______
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7th period is considered as incomplete period even though it has 32 elements. Because it consists of elements whose properties have not been studied properly yet. Most of these elements have only been identified in labs. ... The 7th period is complete.
The Actinide series contains elements with atomic numbers 89 to 103 and is the sixth group in the periodic table. The series is the row below the Lanthanide series, which is located underneath the main body of the periodic table.
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