·The element fe with atomic number 26 undergoes chemical reaction to form an ion with oxidation number +3. a) Write down the subshell electronic configuration of ion?
b) Can this element show variable valency? Why?
c) Write down the chemical formula of one compound formed when this element reacts with oxygen (O⁸)
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1 ) 1s²2s²2p63s²3p63d5
2) yes. because it is a d block elements. d block elements usually shows variable oxidation state
3 ) 2MgO
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