My Tutor catalyst characters chemistry GCSE industry properties of transition elements variable oxidation states Transition elements

Transition elements

Transition elements are the central block of elements in d- block of the periodic table. These metals are

high in melting point
high in density

e. g : Ti, V, Cr, Mn, Fe, Ni , Co

Transition elements are also having unique properties making their studies more interesting. Properties found in Transition elements

has variable oxidation states

Mn Shows several oxidation numbers in differernt compounds ( +7 in KMnO4 , +2 in MnO2)

forms colored compounds

KMnO4 ( Mn with oxidation number +7) has Purple color

K2Cr2O7 (Cr with oxidation number +6) has orange colour

Transition elements are also used as catalysts in several industries.

e.g:

iron in the Haber process
vanadium(V) oxide in the Contact process
nickel in the hydrogenation of alkenes

Advantage of using Catalysts in chemical industry:

lower energy demands and hence are economically advantageous
help conserve energy sources

Arunigd 1:03 AM catalyst characters chemistry GCSE industry properties of transition elements variable oxidation states

Author : Arunigd

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