As scientist have learned more about atoms, models of atoms have changed. one of the first atomic models was a solid ball, such as a marble.
What are two limitations of using a marble to model an atom?
A. The model is much harder to see than a real atom.
B. The model is not made of commonly available material or objects.
C. The model does not show the true size of an atom
D. The model does not move or behave like a real atom.
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The inner planets mercury, venus, earth, and mars were formed by
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What effect has the drug trade had on some governments in middle and south america? a. it has funded political instability. b. many nations have created democratic governments. c. many governments have allowed the drug trade to fund local programs. d. it has funded political stability.
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