What is an isotope? atoms of the same element with different number of​

The same element that contain equal number if protons but different number of neurons in their nuclei and hence differ in relative atomic mass

answer by yourhope:

how do models compare to real-world objects?

d. most models represent a real-world object in a simpler way.

: )

i think it's c. if you look search electronic symbol on google and then click on wiki it shows you a