Unit 4: Chemical Bonding and Molecular Structure
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Questions and Answers

What is the term used to describe a group of atoms that exist together as one species having characteristic properties?

  • Atom
  • Molecule (correct)
  • Compound
  • Element

Which theory can be used to predict the geometry of simple molecules?

  • Molecular orbital theory
  • Hybridization theory
  • Octet rule
  • VSEPR theory (correct)

What approach explains the formation of covalent bonds by overlapping atomic orbitals?

  • Valence bond approach (correct)
  • Kössel-Lewis approach
  • VSEPR theory
  • Hybridization approach

What type of bonds involve the sharing of electrons between atoms?

<p>Covalent bonds (B)</p> Signup and view all the answers

Which theory explains the concept of hydrogen bond?

<p>Valence bond theory (C)</p> Signup and view all the answers

Which type of hybridization involves s, p, and d orbitals?

<p>dsp2 hybridization (A)</p> Signup and view all the answers

According to the Kössel-Lewis approach, how many electrons can the outer shell of an atom accommodate?

<p>Eight electrons (A)</p> Signup and view all the answers

What did Lewis postulate about the achievement of a stable octet by atoms?

<p>It occurs through chemical bond formation, either by electron transfer or electron sharing (C)</p> Signup and view all the answers

What did Kössel and Lewis base their explanation of valence on?

<p>The inertness of noble gases (A)</p> Signup and view all the answers

What is the role of the 'kernel' according to Lewis's model of the atom?

<p>It contains all the inner electrons (D)</p> Signup and view all the answers

How do atoms achieve a stable outer octet of electrons according to Lewis's model?

<p>By sharing a pair of electrons between atoms (C)</p> Signup and view all the answers

What happens in the case of sodium and chlorine according to Lewis's model?

<p>Sodium loses an electron to chlorine (D)</p> Signup and view all the answers

In Lewis's model, how is a chemical bond formed in molecules like Cl2, H2, F2, etc.?

<p>By the sharing of a pair of electrons between the atoms (B)</p> Signup and view all the answers

What do Lewis symbols represent in the formation of a molecule?

<p>The outer shell electrons that take part in chemical combination (B)</p> Signup and view all the answers

What is the main purpose of chemical bonding according to the text?

<p>To attain stability (B)</p> Signup and view all the answers

What does every system tend to be according to the text?

<p>More stable (B)</p> Signup and view all the answers

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