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Introducing new Paper mode
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- Multiple ChoicePlease save your changes before editing any questions.a pure substance containing only one type of atomelementatommoleculecompound
- Multiple ChoicePlease save your changes before editing any questions.two or more elements chemically combinedmoleculecompoundisotopeinert gas
- Multiple ChoicePlease save your changes before editing any questions.a rearrangement of atoms resulting in a new substance being mademeltingboilingphysical changechemical change
- Multiple ChoicePlease save your changes before editing any questions.a change in state or form with no new substance being made (e.g. melting)meltingboilingphysical changechemical change
- Multiple ChoicePlease save your changes before editing any questions.an atom that has gained a charge by gaining or losing electronsisotopeallotropemoleculeion
- Multiple ChoicePlease save your changes before editing any questions.an atom that has a positive charge because it lost electon(s)positronscationsanionsposions
- Multiple ChoicePlease save your changes before editing any questions.an atom that has a negative charge because it gained electon(s)negationnegionanioncation