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Where is the periodic table’s actinide series usually placed?
ChemistryPeriodic Table
Quick Answer
It is usually shown in a separate row below the main table, under the lanthanides. The actinides run from actinium to lawrencium.
The Full Story
The actinides are usually printed in a detached row beneath the main periodic table, below the lanthanides. This series runs from actinium (89) to lawrencium (103). Many actinides are radioactive, and several are synthetic, which is one reason they are grouped separately in most classroom tables. The layout helps preserve the table’s shape while still showing the chemical relationships among these heavy elements.
Key Facts
1.15 elements
2.From atomic numbers 89 to 103
3.Most are radioactive
YouTube Angle
Suggested video title for this topic:
"The radioactive row that sits underneath the table you know"