__________ are atoms with the same atomic number and hence essentially the same chemical properties, but different mass numbers.
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Q7: Explain how the chemical composition of a
Q8: Some minerals contain economically important elements. If
Q9: The three common _ of matter with
Q10: _ are homogeneous masses of material that
Q11: Colloids that consist of microparticles or nanoparticles
Q13: _ form when one or more kinds
Q14: The term _ is specifically applied to
Q15: _ are long, chainlike polymers made of
Q16: The _ of the Earth is a
Q17: The thick shell of dense, rocky matter
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