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OCR: ISOTOPES SOTOPES are different forms of different masses Each "isotopic form the same element (simple type has a different number neutrons of substance). They have identical the nucleus (center) its atoms which chemical properties and occupy the gives different mass same place the periodic table (the Hydrogen gas, for example, can word isotope means same place exist naturally in three isotopic forms: their physical properties that differ, common hydrogen heavy hydrogen because their atoms (tiny particles) have and radioactive hydrogen. COMMON HEAVY RADIOAC TIVE HYDROGEN HYDROGEN HYDROGEN Isotopic forms An atom nucleus consists 0f protons and The vary number between isotopes. One proton One proton and One proton and one neutron two neutrons mOss USINE ALSO SPECT TRME TEF ISOTOPES wary SPECT ...