<span>"They have different numbers of neutrons and different mass numbers. Remember mass number is protons plus neutrons. The number of protons for an element will never change, however the number of neutrons can." I took the test, its D</span>
Answer:
The formula for velocity is v = Δs/Δt
Explanation:
Velocity equals change in speed divided by change in time.
I’ve only had one and it didn’t flow so ion think so
