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 (A)</p>
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What is the process called when a substance changes from a liquid to a gas while gaining energy?

<p>Evaporation (B)</p>
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Which of the following is a pure substance?

<p>A compound like sodium chloride (NaCl) (C)</p>
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What is the term used to describe the ability of a material to allow heat to flow?

<p>Conductivity (D)</p>
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Which of the following is a property that describes how readily a substance combines with other substances?

<p>Reactivity (D)</p>
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What is the process called when a substance changes from a solid to a gas while gaining energy?

<p>Sublimation (B)</p>
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Which scientist is credited as the 'father of the periodic table'?

<p>Dmitri Mendeleev (B)</p>
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What is the term used to describe a combination of two or more substances that are not chemically combined?

<p>Mixture (C)</p>
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What is the term used to describe the measurement of the gravitational force acting on an object?

<p>Weight (D)</p>
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What is the name of the model proposed by Erwin Schrödinger that describes the electron as an 'electron cloud'?

<p>Electron cloud model (B)</p>
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Which of the following is considered the 'simplest form of matter' that cannot be broken down into simpler substances?

<p>Element (C)</p>
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What is the term used to describe the movement of atoms, as mentioned in the text?

<p>Brownian motion (D)</p>
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Which scientist is credited with proposing the 'electron, plum-pudding model'?

<p>J.J. Thomson (C)</p>
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