Periodic table period
Period 6
Period 6 is a horizontal row of the periodic table with 32 elements, from Cesium (atomic number 55) to Radon (atomic number 86). Every element in the row has 6 occupied electron shells. Period 6 is the first 32-element period: after cesium and barium it detours through the fourteen 4f lanthanides before finishing the 5d and 6p subshells with metals such as tungsten, platinum, gold and lead.
At a glance
- Elements
- 32
- Atomic numbers
- 55 to 86
- Blocks
- s-block, f-block, d-block, p-block
- Period
- 6
- Phase at STP
- solid (29), liquid (1), gas (1)
Shared properties
- Each member has 6 occupied electron shells
- Atomic radius generally decreases from left to right across the period
- Ionization energy and electronegativity generally increase across the period
- Character shifts from metallic on the left to nonmetallic on the right