Periodic rows
Periodic Table Periods
Periods are the rows of the periodic table. Moving left to right changes atomic number, electron filling, and recurring chemical trends.
Period 1
Period 1 elements share the same highest occupied electron shell.
Period 2
Period 2 elements share the same highest occupied electron shell.
Period 3
Period 3 elements share the same highest occupied electron shell.
Period 4
Period 4 elements share the same highest occupied electron shell.
Period 5
Period 5 elements share the same highest occupied electron shell.
Period 6
Period 6 elements share the same highest occupied electron shell.
- Cesium (Cs)
- Barium (Ba)
- Lanthanum (La)
- Cerium (Ce)
- Praseodymium (Pr)
- Neodymium (Nd)
- Promethium (Pm)
- Samarium (Sm)
- Europium (Eu)
- Gadolinium (Gd)
- Terbium (Tb)
- Dysprosium (Dy)
- Holmium (Ho)
- Erbium (Er)
- Thulium (Tm)
- Ytterbium (Yb)
- Lutetium (Lu)
- Hafnium (Hf)
- Tantalum (Ta)
- Tungsten (W)
- Rhenium (Re)
- Osmium (Os)
- Iridium (Ir)
- Platinum (Pt)
- Gold (Au)
- Mercury (Hg)
- Thallium (Tl)
- Lead (Pb)
- Bismuth (Bi)
- Polonium (Po)
- Astatine (At)
- Radon (Rn)
Period 7
Period 7 elements share the same highest occupied electron shell.
- Francium (Fr)
- Radium (Ra)
- Actinium (Ac)
- Thorium (Th)
- Protactinium (Pa)
- Uranium (U)
- Neptunium (Np)
- Plutonium (Pu)
- Americium (Am)
- Curium (Cm)
- Berkelium (Bk)
- Californium (Cf)
- Einsteinium (Es)
- Fermium (Fm)
- Mendelevium (Md)
- Nobelium (No)
- Lawrencium (Lr)
- Rutherfordium (Rf)
- Dubnium (Db)
- Seaborgium (Sg)
- Bohrium (Bh)
- Hassium (Hs)
- Meitnerium (Mt)
- Darmstadtium (Ds)
- Roentgenium (Rg)
- Copernicium (Cn)
- Nihonium (Nh)
- Flerovium (Fl)
- Moscovium (Mc)
- Livermorium (Lv)
- Tennessine (Ts)
- Oganesson (Og)