Uranium-235, uranium-238, and uranium-239 are different of uranium.

Isotopes

Explanation:

Atoms of the same element always have the same number of protons. But, Atoms of the same element can have a different number of neutrons. We call these isotopes. These 3 examples of uranium have the same amount of protons within them but a different number of neutrons, hence the change in atomic mass.

igneous rocks also form where plates converge. the subducting plate melts as it sinks into the crust of the earth, and the melt rises into the overriding plate forming volcanoes. metamorphic rocks are formed mainly in the lithosphere, wherever there is high pressure and high temperature. -woods