Metal Used in Nuclear Control Rods, Atomic No. 72
This page is the CodyCross answer for the clue below from Campsite Adventures, Group 839, Puzzle 1 (Pet Supplies).
Question is: Metal Used in Nuclear Control Rods, Atomic No. 72
and the answer is: HAFNIUM
Word Meaning:
HAFNIUM — A chemical element (symbol Hf) with an atomic number of 72: a lustrous, silvery-grey tetravalent transition metal.
Definitions from Wiktionary.