Question

(Use a table) Which two atoms are isotopes of one another? a) Carbon-12 and Carbon-14 b) Hydrogen-1 and Helium-2 c) Oxygen-16 and Nitrogen-14 d) Sodium-23 and Potassium-39

Answer 1

Answer: a) Carbon-12 and Carbon-14

Step-by-step explanation:

The answer is really simple: first of all you already can spot that both are the same element, an isotop is just the variation of the neutrons in the nuclei in the nature.

So the atom still has the same atomic number, the only thing that will change is the neutrons, so the atomic mass (the sum of protons and neutrons). WATCH OUT: isotopes still have the same number of PROTONS so the ELEMENT IS THE SAME.

Hope it helped :)