Second Year Chemistry Transition Elements

$1. Give the electronic configuration of the following elements:(c) Manganese (25)$

$9. Write short notes on:(i) Silvering of mirrors$

$8. What do you know about the chemistry of the following compounds:(iii) \mathrm{K}_{2} \mathrm{CrO}_{4}$

$3. Name the following compounds and give the oxidation number of chromium and manganese in each:(iv) \mathrm{MnO}_{2}$

$1. Give the electronic configuration of the following elements:(a) Scandium (21)$

$1. Give the electronic configuration of the following elements: (d) Iron (26)$