Period: 5th (o-shell)

In the fifth period (o-shell), filling is interrupted again. This initially takes place in the orbitals 5s (Rb and Sr) and 4d (Y–Cd), then with higher energy in 5p (In–Xe).

37Rb

Rubidiumgrey white

38Sr

Strontiumsilvery white metallic; with a pale yellow tint

39Y

Yttriumsilvery white

40Zr

Zirconiumsilvery white

41Nb

Niobiumgray metallic, bluish when oxidized

42Mo

Molybdenumgray metallic

43Tc

Technetiumshiny gray metal

44Ru

Rutheniumsilvery white metallic

45Rh

Rhodiumsilvery white metallic

46Pd

Palladiumsilvery white

47Ag

Silverlustrous white metal

48Cd

Cadmiumsilvery bluish-gray metallic

49In

Indiumsilvery lustrous gray

50Sn

Tinsilvery-white (beta); gray (alpha)

51Sb

Antimonysilvery lustrous gray

52Te

Telluriumsilvery lustrous gray (crystalline); brown-black powder (amorphous)

53I

Iodinelustrous metallic gray (solid); black/violet (liquid); violet (gas)

54Xe

Xenoncolorless gas, exhibiting a blue glow when placed in an electric field

H He Li Be B C N O F Ne Na Mg Al Si P S Cl Ar K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe Cs Ba La Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn Fr Ra Ac Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr Rf Db Sg Bh Hs Mt Ds Rg Cn Nh Fl Mc Lv Ts Og

Legend

1st (k-shell)2nd (l-shell)3rd (m-shell)4th (n-shell)5th (o-shell)6th (p-shell)7th (q-shell)