Periodic Table
Histological Application of Elements

  s series
Representative
Elements
d series
Transition Metals
p series
Representative
Elements
Noble
Gases
Group Ia IIa IIIb IVb Vb VIb VIIb VIII Ib IIb IIIa IVa Va VIa VIIa VIIIa
  1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
Period 1 H   He
Period 2 Li Be   B C N O F Ne
Period 3 Na Mg   Al Si P S Cl Ar
Period 4 K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr
Period 5 Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe
Period 6 Cs Ba La Hf Ta W Re Os Ir Pt Au Hg Ti Pb Bi Po At Rn
Period 7 Fr Ra Ac Rf Db Sg Bh Hs Mt Ds Rg Uub Uut Uuq Uup Uuh Uus Uuo
  f series Transition Metals  
Period 6   Lanthanides Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu  
Period 7   Actinides Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr  
Element Chromium Symbol Cr Atomic Nº 24 Atomic weight 51.99616
Oxidation Nº 2, 3, 6 State (RT) Solid Electronegativity 1.6 Shell 2,8,13,1
Structure Ar3d54s1 MP °C 1857 BP °C 2672 SG 7.18-7.20
Nº Isotopes 4 Isotope 52 Isotope AMU 51.94051 Abundance 83.7892
Discoverer Vauquelin 1797 Click for more information
Potassium dichromate is a common fixing agent. Chromic acid is an oxidising agent used to form aldehydes from polysaccharides. Chrome alum is used as a mordant for gallocyanin in a method for nucleic acids.
Alkali metals Alkali earth metals Transition metals Lanthanides Actinides Poor metals Metalloids Non metals Halogens Noble gases

 


 

 

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