The electron configuration of Fe?* is [Ar]3d°. Which of the following is true about Fe2*? A) Fe2* is diamagnetic. B) Fe2* is paramagnetic with one unpaired electron C) Fe2* is paramagnetic with two unpaired electrons D) Fe2* is paramagnetic with four unpaired electrons. E) Fe2* is paramagnetic with five unpaired electrons.
Formal Charges
Formal charges have an important role in organic chemistry since this concept helps us to know whether an atom in a molecule is neutral/bears a positive or negative charge. Even if some molecules are neutral, the atoms within that molecule need not be neutral atoms.
Polarity Of Water
In simple chemical terms, polarity refers to the separation of charges in a chemical species leading into formation of two polar ends which are positively charged end and negatively charged end. Polarity in any molecule occurs due to the differences in the electronegativities of the bonded atoms. Water, as we all know has two hydrogen atoms bonded to an oxygen atom. As oxygen is more electronegative than hydrogen thus, there exists polarity in the bonds which is why water is known as a polar solvent.
Valence Bond Theory Vbt
Valence bond theory (VBT) in simple terms explains how individual atomic orbitals with an unpaired electron each, come close to each other and overlap to form a molecular orbital giving a covalent bond. It gives a quantum mechanical approach to the formation of covalent bonds with the help of wavefunctions using attractive and repulsive energies when two atoms are brought from infinity to their internuclear distance.
![**Question:**
The electron configuration of Fe²⁺ is [Ar]3d⁶. Which of the following is true about Fe²⁺?
**Options:**
A) Fe²⁺ is diamagnetic.
B) Fe²⁺ is paramagnetic with one unpaired electron.
C) Fe²⁺ is paramagnetic with two unpaired electrons.
D) Fe²⁺ is paramagnetic with four unpaired electrons.
E) Fe²⁺ is paramagnetic with five unpaired electrons.
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**Explanation:**
To determine the magnetic properties of Fe²⁺, we need to examine its electron configuration:
- The electron configuration given is [Ar]3d⁶, which indicates that there are 6 electrons in the 3d subshell.
- In the case of 3d⁶, the electron distribution favors the presence of unpaired electrons. Understanding Hund's Rule, which states that electrons fill degenerate orbitals singly first before pairing up, helps us predict that Fe²⁺ has four unpaired electrons.
Therefore, the correct statement is:
D) Fe²⁺ is paramagnetic with four unpaired electrons.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fe4f6f55f-74e4-4811-89c3-6145bf7c8bd8%2Ff7c283b3-eb5c-4028-812a-2a221ca7a077%2F2wzl04f_processed.png&w=3840&q=75)
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