Ceriumball is a chemical element with symbol Ce and atomic number 58. Cerium is a soft, ductile and silvery-white metal that tarnishes when exposed to air, and it is soft enough to be cut with a knife.
Cerium spectrum visible

Spectral lines

Alkali Metal LithiumballSodiumballPotassiumballRubidiumballCaesiumballFranciumball
Alkali Earth Metal BerylliumballMagnesiumballCalciumballStrontiumballBariumballRadiumball
Transition Metal ScandiumballTitaniumballVanadiumballChromiumballManganeseballIronballCobaltballNickelballCopperballZincballYttriumballZirconiumballNiobiumballMolybdenumballTechnetiumballRutheniumballRhodiumballPalladiumballSilverballCadmiumballHafniumballTantalumballTungstenballRheniumballOsmiumballIridiumballPlatinumballGoldballMercuryballRutherfordiumballDubniumballSeaborgiumballBohriumballHassiumballMeitneriumball (probably) • Darmstadtiumball (probably) • Roentgeniumball (probably) • Coperniciumball
Post-transition Metal AluminiumballGalliumballIndiumballTinballThalliumballLeadballBismuthballNihoniumball (probably) • Fleroviumball (probably) • Moscoviumball (probably) • Livermoriumball (probably) • Tennessinebal (probably)
Lanthanide LanthanumballCeriumballPraseodymiumballNeodymiumballPromethiumballSamariumballEuropiumballGadoliniumballTerbiumballDysprosiumballHolmiumballErbiumballThuliumballYtterbiumballLutetiumball
Actinide ActiniumballThoriumballProtactiniumballUraniumballNeptuniumballPlutoniumballAmericiumballCuriumballBerkeliumballCaliforniumballEinsteinumballFermiumballMendeleviumballNobeliumballLawrenciumball
Chemical elements
Nu N1 N2 N3 N4 N5
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