A. Atomic number
A.
B. Number of neutrons
B.
C. Mass number
C.
D. Charge
D.
Correct Answer: B
সঠিক উত্তর: B
Explanation
ব্যাখ্যা
Isotones are atoms of different elements that have the same number of neutrons in their nucleus, but different numbers of protons (and therefore different atomic numbers and mass numbers).