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An atom is stable if the forces among the particles that makeup the nucleus are balanced. An atom is unstable (radioactive) if these forces are unbalanced; if the nucleus has an excess of internal energy. Instability of an atom's nucleus may result from an excess of either neutrons or protons.
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Answer:
Consumer: a person or thing that eats or uses something.
Producer: an organism that produces. (makes) its own food.
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Answer:
Water will move in and out of the cell equally