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Eighth Grade (Grade 8) Matter Questions

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Grade 8 Quantum Physics and the Atom
A substance that cannot be broken down into simpler substances by physical or chemical means.
  1. Matter
  2. Element
  3. Metalloid
  4. Molecule
Grade 8 Matter
Which of the following statements in incorrect? (more than one answer)
  1. Isobars possess the same chemical properties.
  2. Isotopes occupy the same position on the Periodic Table.
  3. Isotopes possess the same atomic number.
  4. In isobars, the total number of protons and neutrons in the nucleus in same.
Grade 8 Matter
Which statement about the Law of Conservation of Mass is NOT true?
  1. The mass of reactants must equal the mass of products.
  2. All the atoms on the reactants side of an equation are also on the products side.
  3. The reaction creates new types of atoms.
  4. Atoms are not lost, but are rearranged.
Grade 8 Quantum Physics and the Atom
What is an element that has properties of metals and nonmetals?
  1. Matter
  2. Element
  3. Metalloid
  4. Molecule
Grade 8 Matter
What is the definition of density?
  1. How big or small something is
  2. the amount of matter in a given volume
  3. how much space something has
  4. the size of something
Grade 8 Matter
Oxygen is a                  .
  1. metal
  2. metalloid
  3. nonmetal
  4. none of the above
Grade 8 Matter
Which of the following elements in this group is very stable?
  1. alkali metals
  2. halogens
  3. transitional
  4. noble gases
Grade 8 Matter
These elements can react with a metal and form a salt.
  1. halogen
  2. noble gases
  3. metalloids
  4. carbon
Grade 8 Matter
Which of these is a chemical change?
  1. Paper is shredded
  2. Liquid wax turns solid
  3. Salt dissolves in water
  4. Soap scum forms
Grade 8 Matter
To determine the density of a substance, what formula must be used?
  1. D= M/V
  2. D= M x V
  3. D= V/M
  4. D= M+ V
Grade 8 Matter
These elements don't react violently.
  1. alkali metals
  2. transitional
  3. alkaline metals
  4. none of the above
Grade 8 Matter
These metals are used in construction activities.
  1. alkali metals
  2. alkaline earth metals
  3. transitional elements
  4. none of the above
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