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)

c. 75.7

i think that is the right