Atom Whose Neutron Count Varies From the Standard
Puzzle 4 of The Moon Hard Pack
Question
Atom Whose Neutron Count Varies From the Standard
Answer
ISOTOPE
Word Meaning:
ISOTOPE — (nuclear physics) Any of two or more forms of an element where the atoms have the same number of protons, but a different number of neutrons within their nuclei. Thus, isotopes have the same atomic number but a different mass number.
Definitions from Wiktionary.