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Contrast the shape, structure, and formation of composite and shield volcanoes.
Uranium
A heavy, silvery-white metallic element, radioactive and used as fuel in nuclear reactors and weapons.
Isotope
Variants of a particular chemical element which differ in neutron number but have the same number of protons.
Iron-56
An isotope of iron with a mass number of 56, known for its stability and abundant presence in the universe.
Neutrons
Subatomic particles found in the nucleus of an atom, with no electrical charge and a mass slightly larger than that of protons.
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