Here's why:

* Ferromagnetism: This property allows a material to be strongly attracted to magnets and to become magnetized itself.

* Nickel's Magnetism: Nickel is a transition metal with a partially filled d-electron shell, which contributes to its strong magnetic properties.

* Common Use: Nickel is commonly used in alloys like stainless steel, where it contributes to the material's strength and corrosion resistance. It's also used in electromagnets and other magnetic applications.

While iron is the most common ferromagnetic element, nickel plays a significant role in many magnetic materials and applications.