Question

Which of the following is the best definition of an isotope?
A. elements of the same kind with different numbers of neutrons
B. elements of the same kind that have lost electrons
C. elements of the same kind that have different electrical charges

Answer 1

by definition an isotopes are elements with the same number of electrons or protons or atomic number but different mass number. so the closest answer will be Letter A since Atomic mass or mass number is the number of protons + number of neutrons inside the nucleus of an atom.