Chemistry: Periodic Table and Atomic Structure Review
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Questions and Answers

Which element is considered the least reactive according to the given information?

  • Lithium
  • Calcium
  • Copper (correct)
  • Sodium

    • Who is credited as the father of the periodic table?

  • Dmitri Mendeleev (correct)
  • John Newlands
  • Johann Dobereiner
  • John Dalton

    • What does the atomic number on the left side of the element symbol represent?

  • The number of electrons
  • The atomic mass
  • The number of neutrons
  • The number of protons (correct)

    • Which scientist proposed the electron cloud model, also known as the orbital model?

    <p>Erwin Schrödinger</p> Signup and view all the answers

    What is the process called when a substance changes from a liquid to a gas while gaining energy?

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

    Which of the following is a pure substance?

    <p>A compound like sodium chloride (NaCl)</p> Signup and view all the answers

    What is the term used to describe the ability of a material to allow heat to flow?

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

    Which of the following is a property that describes how readily a substance combines with other substances?

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

    What is the process called when a substance changes from a solid to a gas while gaining energy?

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

    Which scientist is credited as the 'father of the periodic table'?

    <p>Dmitri Mendeleev</p> Signup and view all the answers

    What is the term used to describe a combination of two or more substances that are not chemically combined?

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

    What is the term used to describe the measurement of the gravitational force acting on an object?

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

    What is the name of the model proposed by Erwin Schrödinger that describes the electron as an 'electron cloud'?

    <p>Electron cloud model</p> Signup and view all the answers

    Which of the following is considered the 'simplest form of matter' that cannot be broken down into simpler substances?

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

    What is the term used to describe the movement of atoms, as mentioned in the text?

    <p>Brownian motion</p> Signup and view all the answers

    Which scientist is credited with proposing the 'electron, plum-pudding model'?

    <p>J.J. Thomson</p> Signup and view all the answers

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