Periodic table period
Period 7
Period 7 is a horizontal row of the periodic table with 32 elements, from Francium (atomic number 87) to Oganesson (atomic number 118). Every element in the row has 7 occupied electron shells. Period 7 holds the radioactive heavyweights: the actinides, including uranium and plutonium, followed by the synthetic superheavy elements through oganesson, which completes the period.
At a glance
- Elements
- 32
- Atomic numbers
- 87 to 118
- Blocks
- s-block, f-block, d-block, p-block
- Period
- 7
- Phase at STP
- solid (12)
Shared properties
- Each member has 7 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