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Ninth Grade (Grade 9) Matter Questions

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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 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
Which property of a solid measures how resistant the material is to deformation?
  1. elasticity
  2. hardness
  3. plasticity
  4. resilience
Grade 9 Matter
This is the basic unit of matter.
  1. photon
  2. atom
  3. molecule
  4. compound
Grade 9 Matter
What is the most common state of matter in the universe?
  1. solid
  2. liquid
  3. gas
  4. plasma
Grade 9 Thermodynamics
Allotropes are considered to be what?
  1. Chemical elements to exist in two or more different forms.
  2. An atom or molecule with a net electric charge due to the loss or gain of one or more electrons.
  3. A covalent bond is a chemical bond that involves the sharing of electron pairs between atoms.
  4. It is a type of chemical bond that generates two oppositely charged ions.
Grade 9 Matter
The process by which a liquid becomes a gas is               .
  1. evaporation
  2. condensation
  3. sublimation
  4. diffusion
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
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