What element has the symbol 'Nd'?

The story behind the answer

Nd is the symbol for Neodymium (atomic number 60), a lanthanide “rare earth” metal best known for making extremely strong permanent magnets (NdFeB) used in headphones, hard drives, and electric motors. The other options have different symbols: Nickel is Ni, Nobelium is No, and Nihonium is Nh.

Fun fact: “Neodymium” comes from Greek neos (new) + didymos (twin). In 1885, Carl Auer von Welsbach separated “didymium” into two new elements—neodymium and praseodymium. Memory tip: think “Neo’s magnets” or “Nd = NeoDy-mium,” linking Nd to the famously powerful neodymium magnets.