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Ninth Grade (Grade 9) Matter Questions

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Grade 9 Quantum Physics and the Atom
What does the atomic number tell about an atom?
  1. the number of protons
  2. the number of protons and neutrons
  3. the number of electrons
  4. the number of neutrons
Grade 9 Matter
How can we correctly define all matter in the universe?
  1. As anything with mass, only
  2. As anything that occupies space, only
  3. As anything that contains pure substances, only
  4. As anything with mass that occupies space
Grade 9 Matter
This is the basic unit of matter.
  1. photon
  2. atom
  3. molecule
  4. compound
Grade 9 Matter
Grade 9 Matter
Grade 9 Quantum Physics and the Atom
How many electrons would it take to equal the mass of a single proton or neutron?
  1. less than one, electrons are bigger than either
  2. 1,836 electrons
  3. 565 electrons
  4. 36 electrons
Grade 9 Quantum Physics and the Atom
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