Question

Give Electronic Configuration of the above ions:
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Answer 1

Explanation:

Characteristic reactions of Cu²⁺

The +2 oxidation state is more common than the +1. Copper(II) is commonly found as the blue hydrated ion, [Cu(H2O)4]2+ .

Aqueous Ammonia

Copper(II) ion reacts with stoichiometric quantities of aqueous ammonia to precipitate light blue Cu(OH)2. Some basic salts may also form

Most common oxidation state: +3; +2 and +6 also exist. The +3 oxidation state is the most stable.

M.P. 1857º

B.P. 2672º

Density 8.94 g/cm3

Characteristics: Chromium is a silvery, rather brittle metal. Similar to aluminum, but exhibits several oxidation states.

Aqueous Ammonia

Ammonia reacts with chromium(III) ion to precipitate gray-green chromium(III) hydroxide:

Answer 2

Explanation:

cu2+= [Ar]3d⁸

cr3+= [Ar]3d²

Fe2+=[Ar]3d⁶

Fe3+=[Ar]3d⁵

H- = 1s²

S2- = 1s²2s²2p⁶3s²3p⁶