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Question

In which group do coloured salts belong in a periodic table?


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Solution

  • The transition elements of group 6 to 11 are coloured
  • Transition elements are d block elements
  • When the last electron of an atom enters into the d subshell, then the elements are called transition elements.
  • Transition elements are coloured
  • Because it shows shows variable valency.
  • It is due to the presence of d electrons.
CationsSymbolColour
Manganese ionMn2+pink
Chromium ionCr3+green
Nickel ionNi2+green
Ferrous ionFe2+light green
Ferric ionFe3+yellow
Cupric ionCu2+Blue

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