Isotopes are atoms of the same element that have the same number of nucleic protons, but different numbers of nucleic neutrons. This has the effect that they have a different mass number. However they have the same atomic number because that is a measure of how many protons are in the nucleus
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<span> If you use as much force on a bigger object and a smaller object the smaller object will have more acceleration, because the smaller object has less mass. </span>