electronic configuration of fe 2+?

Answer 1

Ferric iron is relatively insoluble in water. A salt (chemistry) of ferric iron hydrolyzes water and produces iron(III) oxide-hydroxides while contributing hydrogen ions to the solution, lowering the pH compared to a solution of equal molarity (based on the anion concentration) solution of the analogous sodium or potassium salt.

Ferric dosing can be used to mitigate the impact of nutrient loading in lakes by reducing the bioavailability of phosphorous in the water column. This can aid management strategies for reducing eutrophication in lake systems.

Ferric oxide, formula Fe2O3 is red-brown colored and the main constituent of the mineral hematite.

In chemistry the term is reserved for iron with an oxidation number of +3, denoted iron(III) or Fe3+, whereas ferrous indicates that it has oxidation number of +2, denoted iron(II) or Fe2+, which combine with other atoms to form molecules.

Answer 2

Fe is a d-block element. Elements of this group has variable valency. Fe has +2 and +3 valance, and that is why it is one of the best example of Oxidation - Reduction reactions. The simple most answer to your question is Fe+2 has 3d6 electronic configuration, because outer most orbit has 6 electrons in d. In detail it can be written as 1s2, 2s2, 2p6, 3s2, 3p6, 3d6, or as Ar-3d6. for Fe+3 it will be Ar-3d5. For Fe+3, d is half filed, and that is why it has strong colour then Fe+2.

Answer 3

[Ar] 4s2 3d4

Answer 4

[Ar]3d4

Answer 5

[Ar] 3d6