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This Concept Map, created with IHMC CmapTools, has information related to: basic structure of matter, protons which has a positive charge, elements have different forms, called ions, subatomic particles such as neutrons, elements are made of atoms, subatomic particles such as electrons, neutrons which has a neutral charge, What is the basic structure of matter? its simplest form is elements, atoms which consist of subatomic particles, electrons which has a negative charge, subatomic particles such as protons