The most abundant element in alloy misch metal is:

Ce

The correct answer is option 2. Ce.

Misch metal is an alloy primarily composed of rare earth elements, and it's commonly used in the manufacture of flints for lighters and in certain metallurgical applications.

• The most abundant element in misch metal is Cerium (Ce), which typically makes up about 45–50% of the alloy.

• Other elements present include lanthanum (La), neodymium (Nd), and small amounts of iron (Fe) and calcium (Ca), but Cerium is the dominant one.

***