Atoms, Elements, Compounds, Mixtures Crossword Puzzle

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QUESTIONS LIST: atom : the smallest thing that can exist on it's own, compound : two or more elements chemically joined, not easily separated, element : material made of all of one type of atom, mixture: two of more elements, mixed together, easily separated, nucleus: centre of the atom, proton : positively charged subatomic particle, neutron : neutral subatomic particle, electron : negatively charged subatomic particle