Answer:
Since different isotopes of an element have different numbers of neutrons (but always the same number of protons) they have different mass numbers. Nitrogen-14 and nitrogen-15 are both stable isotopes of nitrogen. However, the other 5 isotopes are all unstable.
Answer:
The differemt isotopes that differ in atomic mass
Explanation:
The answears are in the attached photo.
The average speed is 160 meters a minute.
