Question

Identify ferromagnetic element from following.

• A. Iron
• B. Vanadium
• C. Chromium
• D. Manganese

Hint:

The three standard d-block elements that show strong ferromagnetism at standard conditions can be easily memorized using the short phonetic acronym "FeCoNi" (Iron, Cobalt, and Nickel).

Answer 1

The Correct Option is A

Step 1: Understanding the Question:
We are required to select the element from the given options that displays ferromagnetic behavior at room temperature.

Step 2: Key Formula or Approach:
Ferromagnetism is a property shown by substances that are strongly attracted by a magnetic field and can retain permanent magnetization even after the external magnetic field is removed. Common examples of transitions metals that are ferromagnetic at room temperature include Iron (Fe), Cobalt (Co), and Nickel (Ni).

Step 3: Detailed Explanation:
Let us examine the magnetic configurations of the provided options at room temperature: 1.

Iron (Fe): Possesses uncompensated parallel alignment of magnetic domains, making it a classic and strong ferromagnetic element.
2.

Vanadium (V): It is weakly attracted to magnetic fields and behaves as a paramagnetic material.
3.

Chromium (Cr): It exhibits antiferromagnetic ordering at room temperature, where magnetic moments align in alternating opposite directions, canceling each other out.
4.

Manganese (Mn): Shows complex antiferromagnetic behavior at standard conditions.
Therefore, Iron is the clear ferromagnetic choice among the options listed.

Step 4: Final Answer:
The ferromagnetic element is Iron, which corresponds to option (A).