An isotope is a different form of an element. if two atoms are isotopes of the same element, then they will have the same number of which type of particle?

Isotopes are atoms of the same element that contain an identical number of protons, but a different number of neutrons.

Explanation:

hope it helps

fumikage isn't really a bird, and tsuyu does have teeth. tsuyu has a transformation quirk which still allows her to be partially human. otherwise we'd have a large frog running around. fumikage has teeth because again, he isn't a bird. his head was a quirk mixture if i'm correct.