Which of the following is in the lanthanide family?

A) Uranium

B) Promethium

C) Silver

D) Gold

It is Promethium

Explanation:

Because they are chemical elements with atomic numbers 57 through 71

The answer is B) Promethium

Explanation:

The Promethium is a chemical element of the periodic table whose symbol is Pm and its atomic number is 61 and is part of the group of lanthanide elements.

Lanthanides are a group of elements that are part of period 6 of the periodic table of the elements whose name comes from the chemical element lanthanum, which is included within this group, giving a total of 15 elements, from the element of atomic number 57 (lanthanum) to 71 (lutetium)