Actinides: Elements 90-103
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Questions and Answers

What happens to the solubility of gases when temperature decreases?

  • It becomes zero
  • It increases (correct)
  • It decreases
  • It remains the same
  • What is the effect of increasing pressure on the solubility of gases?

  • It increases (correct)
  • It becomes infinite
  • It decreases
  • It remains the same
  • What type of solvent dissolves ionic substances?

  • Non-polar
  • Polar (correct)
  • Ionic
  • None of the above
  • What is the principle behind solubility of gases and solvents?

    <p>Like dissolves like</p> Signup and view all the answers

    What type of substances are usually dissolved by polar solvents?

    <p>Polar and ionic</p> Signup and view all the answers

    What is the primary characteristic of the chemical combinations illustrated in the given options?

    <p>Variable ratio of elements</p> Signup and view all the answers

    Which of the following best represents the type of chemical bonding in the given options?

    <p>Covalent bonding</p> Signup and view all the answers

    What is the common feature among the options CC₁₄ and CF₄, O₂ and O₃, H₂O and H₂S, and FeO and Fe₂O₃?

    <p>Same element in different compounds</p> Signup and view all the answers

    Which of the following statements is true about the compounds listed?

    <p>They all have different ratios of elements</p> Signup and view all the answers

    What do the options illustrate about the elements involved?

    <p>Their ability to form compounds with different ratios</p> Signup and view all the answers

    How many elements are classified as actinides?

    <p>14</p> Signup and view all the answers

    What is the range of atomic numbers of actinides?

    <p>90-103</p> Signup and view all the answers

    What is a characteristic property of actinides?

    <p>They have the same chemical and physical properties</p> Signup and view all the answers

    What is true about the physical properties of actinides?

    <p>They are the same for all actinides</p> Signup and view all the answers

    What can be said about the chemical properties of actinides?

    <p>They are the same for all actinides</p> Signup and view all the answers

    What is the kinetic energy of a particle depend on?

    <p>Mass and velocity</p> Signup and view all the answers

    Which of the following is a characteristic of collisions between gas particles?

    <p>Elastic collisions with no loss or gain of energy</p> Signup and view all the answers

    Why do gas particles have different speeds at a given temperature?

    <p>Due to collisions between particles</p> Signup and view all the answers

    What is a characteristic of the motion of gas particles?

    <p>Random motion due to collisions</p> Signup and view all the answers

    What is true about the interaction between gas particles?

    <p>There are no attractive or repulsive forces between particles</p> Signup and view all the answers

    What can be inferred about the kinetic energy of CH₄(g) molecules compared to O₂(g) molecules?

    <p>The kinetic energy of CH₄(g) molecules is lower than that of O₂(g) molecules.</p> Signup and view all the answers

    Which of the following is a consequence of the difference in kinetic energy between CH₄(g) and O₂(g) molecules?

    <p>The CH₄(g) molecules will react slower with other molecules.</p> Signup and view all the answers

    What is the relationship between the kinetic energy and speed of a molecule?

    <p>The kinetic energy of a molecule is directly proportional to the square of its speed.</p> Signup and view all the answers

    Which of the following is true about the speed of CH₄(g) molecules compared to O₂(g) molecules?

    <p>The speed of CH₄(g) molecules is less than that of O₂(g) molecules.</p> Signup and view all the answers

    What can be inferred about the molecular mass of CH₄(g) and O₂(g) molecules?

    <p>The molecular mass of CH₄(g) is less than that of O₂(g) molecules.</p> Signup and view all the answers

    Study Notes

    Actinides

    • Actinides are a group of 14 elements with atomic numbers ranging from 90 to 103.
    • They exhibit similar chemical and physical properties.

    Chemical Bonding

    • The capability of two elements to combine in different ratios can be illustrated by FeO and Fe₂O₃.

    Solubility of Gases

    • Solubility of gases increases as temperature decreases or as pressure increases.
    • Like dissolves like, meaning polar solvents dissolve polar or ionic substances.

    Kinetic Molecular Theory of Gases

    • Gas particles have different speeds at a given temperature due to collisions.
    • Gas particles move in a random way due to collisions.
    • Collisions between gas particles are elastic, resulting in no loss or gain of energy.
    • Gases consist of discrete particles, including atoms (noble gases) and molecules (H2, O2, N2, and Cl2).
    • There is no attraction or repulsion between gas particles.

    Gas Properties

    • The average kinetic energy of CH₄ (g) molecules is less than that of O₂ (g) molecules.
    • The average speed of CH₄ (g) molecules is less than that of O₂ (g) molecules, due to their smaller mass.

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    Description

    Learn about the actinides, a series of 14 elements with atomic numbers from 90 to 103, and their shared chemical and physical properties.

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