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Ninth Grade (Grade 9) Matter Questions

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Grade 9 Matter
This is the basic unit of matter.
  1. photon
  2. atom
  3. molecule
  4. compound
Grade 9 Quantum Physics and the Atom
Which of the following would be an isotope of aluminum?
  1. Atom A: mass number=24, atomic number=13
  2. Atom B: mass number=24, atomic number=12
  3. Atom C: mass number=26, atomic number=14
  4. Atom D: mass number=22, atomic number=11
Grade 9 Quantum Physics and the Atom
Which force is responsible for holding the nucleus of an atom together?
  1. Electromagnetic force
  2. Strong nuclear force
  3. Weak force
  4. Gravitational force
Grade 9 Quantum Physics and the Atom
Grade 9 Quantum Physics and the Atom
What are the three subatomic particles found in an atom?
  1. electron, proton, neutron
  2. neutron, photon, electron
  3. electron, proton, ion
  4. proton, neutron, isotope
Grade 9 Quantum Physics and the Atom
Which of the following statements about groups is true?
  1. Groups are horizontal
  2. There are 7 groups
  3. Elements in a group have similar chemical properties
  4. Groups indicate energy levels of elements
Grade 9 Quantum Physics and the Atom
What is the mass of a proton or a neutron?
  1. 1 amu
  2. 2 amu
  3. 1 gram
  4. 0.34 amu
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
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 Quantum Physics and the Atom
Which parts of the atom are located in the nucleus?
  1. electrons and protons
  2. neutrons and electrons
  3. protons and neutrons
  4. protons only
Grade 9 Quantum Physics and the Atom
Where are electrons located in an atom?
  1. nucleus
  2. center
  3. electron cloud
  4. everywhere
Grade 9 Matter
Grade 9 Quantum Physics and the Atom
What does the mass number of an atom tell you about the atom?
  1. number of electrons
  2. number of protons
  3. number of neutrons
  4. number of protons and neutrons
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