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Ninth Grade (Grade 9) Quantum Physics and the Atom Questions

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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
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
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
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
Where are electrons located in an atom?
  1. nucleus
  2. center
  3. electron cloud
  4. everywhere
Grade 9 Quantum Physics and the Atom

This question is a part of a group with common instructions. View group »

How could the charge of a neutral carbon atom be changed, such that a negative ion would form? (Note: The type of element, carbon, cannot be changed.)
  1. add a proton
  2. add an electron
  3. subtract an electron
  4. subtract a proton
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
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
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
An element's electrons can absorb photons with any amount of energy.
  1. True
  2. False
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