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

A.
Since an Isotopes are atoms of the same element with same no of protons(atomic no) but different mass numbers(neutrons+protons).
No of protons is constant so a change in mass no is only due to difference in the no of neutrons.
Hope this helps

Answer 2

A

Answer 3

A

Answer 4

Sounds like a chemistry type question to me...