Answer:
In this case the mass number would be 11.
Explanation:
The mass number of an element is the sum of the protons and neutrons. The number of neutrons for a given element is the only number that can change and still have the identity of the element stay the same, (because the atomic number is the number of protons).
Answer:
length
Explanation:
cm measures length. Think of a ruler.
One way they are different is that they show elevation
Potential energy and height; best guess;)
