Question

Chromium(IV) oxide is used in making magnetic recording tapes because of its paramagnetic properties. a) Give the electron configuration of Cr and determine the number of unpaired electrons on each chromium atom. b) Suggest an ion from the same row of the periodic table that might be even more paramagnetic.

Answer 1

7. @ Ans - The atomie number of or is 24. The electrome confeguration of ar is a Cup = 15 25 22635²306 3d5451 = [Ar] 3d5 aš not [Ar]3d4 45² becaused sobital is stablo if the orbital is half or full-filled. So, eletronie configuration of begg is [Ar] 3d5 45' to acquire half-filled configuration. The electronic configuration of creat is 4+ = 15 ²25 226 35 3p%3d 2 45 It is because to form Creft , & electrons are removed from its onter shells. One electron fare from 4s shell and thru elitrons from 3d shells.

The d- obital can be denoted as 3d 50, in Gat alom, a unpaired electrons are present Ans - Paramagnetic properties depend on the unpaired electrons. So more the unpaired electrows move the paramagnetic properties One on from the same dow of the periodu table that might have move para magnetic is. mmat Atomie number of mn is 25. Electronic configuration mas - [A-]3d545 eletronic configuration of mu2t is a [Ar] 11111111 2 elutrons are removed from as shell Jo, mo2t has more unpaired electrons than Grett Thus Mn2t is more paramagnetic