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 Tungsten Symbol W Atomic Nº 74 Atomic weight 183.841
Oxidation Nº 2, 3, 4, 5, 6 State (RT) Solid Electronegativity 1.7 Shell 2,8,18,32,12,2
Structure Xe4f145d46s2 MP °C 3410 ±20 BP °C 5660 SG 19.3
Nº Isotopes 5 Isotope 184 Isotope AMU 183.950933 Abundance 30.642
Discoverer J. & F. Elhuyar 1783 Click for more information
Tungstophosphoric (phosphotungstic) acid is used in trichrome methods both to differentiate the plasma stain and to slow the fibre stain. It is the mordant in phosphotungstic acid hematoxylin (PTAH).
Alkali metals Alkali earth metals Transition metals Lanthanides Actinides Poor metals Metalloids Non metals Halogens Noble gases

 


 

 

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