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Chemical Formulas and John Dalton's Atomic Theory Quiz
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Chemical Formulas and John Dalton's Atomic Theory Quiz

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@SensibleChrysanthemum

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Questions and Answers

What is the smallest particle of an element?

  • Electron (correct)
  • Molecule
  • Neutron
  • Proton

    • According to John Dalton, what are identical in mass and chemical properties?

  • Atoms of a given element (correct)
  • Molecules
  • Protons
  • Neutrons

    • What is the electrical charge of a proton?

  • Negative
  • Positive (correct)
  • Varies
  • Neutral

    • What is the mass number of an atom composed of 6 protons and 7 neutrons?

    <p>13</p> Signup and view all the answers

    What term defines atoms with the same atomic number but different mass numbers?

    <p>Isotopes</p> Signup and view all the answers

    Which substance is an example of having monatomic molecules?

    <p>Ar gas</p> Signup and view all the answers

    What are atoms and molecules possessing an electric charge called?

    <p>Ions</p> Signup and view all the answers

    Which of the following is a characteristic of nonelectrolytes?

    <p>They are compounds that do not conduct electricity</p> Signup and view all the answers

    How are formulas of substances represented?

    <p>With symbols of elements and numerical subscripts indicating the number of atoms of each element</p> Signup and view all the answers

    What does the superscript in a formula for a polyatomic ion represent?

    <p>The charge on the ion</p> Signup and view all the answers

    In naming a compound, what is the ending changed to when naming the nonmetal part?

    <p>-ide</p> Signup and view all the answers

    What does Molarity (M) measure?

    <p>The moles of solute in a liter of solution</p> Signup and view all the answers

    What is Normality (N) a measure of?

    <p>The number of equivalents of solute in 1 L of solution</p> Signup and view all the answers

    How is weight percent commonly expressed?

    <p>(w/w)</p> Signup and view all the answers

    What is used to express the composition of dilute aqueous solutions?

    <p>Parts per million (ppm)</p> Signup and view all the answers

    What is the normality of a solution if 20 ml of 10 N HCl are diluted to form one liter of the solution?

    <p>1 N</p> Signup and view all the answers

    A chemical formula is not just a shorthand notation for the name of a substance.

    <p>True</p> Signup and view all the answers

    According to John Dalton, all atoms of a given element are identical in mass and chemical properties.

    <p>True</p> Signup and view all the answers

    Molecules always consist of monatomic atoms.

    <p>False</p> Signup and view all the answers

    The mass of an electron is about 1/2000 that of a proton.

    <p>True</p> Signup and view all the answers

    Isotopes have the same atomic number but different mass numbers.

    <p>True</p> Signup and view all the answers

    Ar gas consists of diatomic molecules.

    <p>False</p> Signup and view all the answers

    Ions are molecules that do not possess an electric charge.

    <p>False</p> Signup and view all the answers

    Nonelectrolytes can conduct electricity even when melted.

    <p>False</p> Signup and view all the answers

    Formulas of substances include the symbols of elements with numerical subscripts to denote the number of atoms in the substance.

    <p>True</p> Signup and view all the answers

    Polyatomic ions do not have a superscript that denotes the charge on the ion.

    <p>False</p> Signup and view all the answers

    In the name of a compound, the nonmetal part's ending is changed to 'ide'.

    <p>True</p> Signup and view all the answers

    Molarity measures the number of moles of solute in 1 liter of solvent.

    <p>False</p> Signup and view all the answers

    Normality is a measure of equivalents of solute in 1 L of solution.

    <p>True</p> Signup and view all the answers

    Weight percent is often used to express the concentration of solid reagents.

    <p>False</p> Signup and view all the answers

    Volume percent is typically used to specify the concentration of pure liquid compounds.

    <p>True</p> Signup and view all the answers

    Parts per million (ppm) is commonly used for highly concentrated solutions.

    <p>False</p> Signup and view all the answers

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