Gr 10 Physical Sciences Ch 4: Lewis structures
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Questions and Answers

How many electrons are shared in a single covalent bond?

  • 3
  • 4
  • 2 (correct)
  • 1

    • What is the type of bond formed when six electrons are shared between two atoms?

  • Triple Bond (correct)
  • Single Bond
  • Double Bond
  • Quadruple Bond

    • How many pairs of dots are placed between the C and O symbols in the Lewis notation of CO₂?

  • 2 (correct)
  • 4
  • 3
  • 1

    • How many valence electrons does the oxygen atom have in the H₂O molecule?

    <p>4 (B)</p> Signup and view all the answers

    What is the type of bond formed between the carbon and nitrogen atoms in the HCN molecule?

    <p>Triple Bond (A)</p> Signup and view all the answers

    How many pairs of dots are placed between the H and C symbols in the Lewis notation of HCN?

    <p>1 (B)</p> Signup and view all the answers

    How many valence electrons does the nitrogen atom have in the HCN molecule?

    <p>2 (D)</p> Signup and view all the answers

    How many pairs of electrons are shared in a double covalent bond?

    <p>2 (B)</p> Signup and view all the answers

    What is the purpose of determining the valence electrons in an atom's electronic structure?

    <p>To determine the number of electrons in the outermost energy level (D)</p> Signup and view all the answers

    How many valence electrons does a chlorine atom have?

    <p>7 (D)</p> Signup and view all the answers

    What is the symbol for hydrogen in Lewis notation?

    <p>H with 1 dot (B)</p> Signup and view all the answers

    How are the dots arranged in Lewis notation for a chlorine atom?

    <p>In pairs to reflect the electron configuration (B)</p> Signup and view all the answers

    What is formed when a hydrogen atom shares one electron with a chlorine atom?

    <p>A single covalent bond (A)</p> Signup and view all the answers

    How many valence electrons does each iodine atom have in a molecule of I₂?

    <p>7 (D)</p> Signup and view all the answers

    What is represented by the pair of dots between the H and Cl symbols in the Lewis structure of HCl?

    <p>A shared electron (D)</p> Signup and view all the answers

    How are the remaining valence electrons of chlorine represented in the Lewis structure of HCl?

    <p>With three additional pairs of dots (A)</p> Signup and view all the answers

    What is the energy level from which we determine the valence electrons in an atom's electronic structure?

    <p>The outermost energy level (B)</p> Signup and view all the answers

    How are the dots typically arranged in Lewis notation for a chlorine atom?

    <p>In pairs at the top, right, and bottom, and a single dot on the left (D)</p> Signup and view all the answers

    What is represented by the symbol for hydrogen in Lewis notation?

    <p>One valence electron (B)</p> Signup and view all the answers

    How many electrons are represented by the dots around the chlorine symbol in the Lewis structure of HCl?

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

    What is formed when a hydrogen atom shares one electron with another atom?

    <p>A single covalent bond (C)</p> Signup and view all the answers

    What is the purpose of determining the valence electrons in an atom's electronic structure?

    <p>To determine the number of valence electrons in the atom (B)</p> Signup and view all the answers

    What do the dots around the symbol for an atom represent in Lewis notation?

    <p>The valence electrons of the atom (D)</p> Signup and view all the answers

    What is the arrangement of the dots around the iodine symbol in the Lewis structure of I₂?

    <p>Three pairs of dots (B)</p> Signup and view all the answers

    What is the type of bond formed when two atoms share two pairs of electrons?

    <p>Double covalent bond (B)</p> Signup and view all the answers

    How many valence electrons are represented by the dots around the oxygen atom in the Lewis notation of H₂O?

    <p>4 (A)</p> Signup and view all the answers

    What is the type of bond formed when two atoms share one pair of electrons?

    <p>Single covalent bond (B)</p> Signup and view all the answers

    How many valence electrons are represented by the dots around the carbon atom in the Lewis notation of HCN?

    <p>None (A)</p> Signup and view all the answers

    What is the type of bond formed when two atoms share three pairs of electrons?

    <p>Triple covalent bond (A)</p> Signup and view all the answers

    How many valence electrons are represented by the dots around the nitrogen atom in the Lewis notation of HCN?

    <p>2 (B)</p> Signup and view all the answers

    What is the arrangement of dots around the oxygen atom in the Lewis notation of CO₂?

    <p>One pair of dots above and one pair below (B)</p> Signup and view all the answers

    What is the type of bond formed between the iodine atoms in the Lewis notation of I₂?

    <p>Single covalent bond (D)</p> Signup and view all the answers

    What is the representation of a single covalent bond in Lewis notation?

    <p>A single pair of dots between the atoms (A)</p> Signup and view all the answers

    What type of bond is formed when four electrons are shared between two atoms?

    <p>Double bond (B)</p> Signup and view all the answers

    How many valence electrons does the oxygen atom have in the CO₂ molecule?

    <p>4 (B)</p> Signup and view all the answers

    What is the representation of the remaining valence electrons in Lewis notation?

    <p>Pairs of dots around the atom (C)</p> Signup and view all the answers

    How many pairs of dots are placed between the H and O symbols in the Lewis notation of H₂O?

    <p>2 (D)</p> Signup and view all the answers

    What is the arrangement of the dots around the carbon atom in the Lewis notation of HCN?

    <p>Three pairs of dots (D)</p> Signup and view all the answers

    What is the type of bond formed between the carbon and oxygen atoms in the CO₂ molecule?

    <p>Double bond (A)</p> Signup and view all the answers

    What is the representation of the shared electrons in the Lewis notation of I₂?

    <p>A single pair of dots between the atoms (A)</p> Signup and view all the answers

    What is the outermost energy level of an atom's electronic structure used for?

    <p>Determining the number of valence electrons (B)</p> Signup and view all the answers

    How are the valence electrons represented in Lewis notation for a chlorine atom?

    <p>With three pairs of dots and one single dot around the symbol (B)</p> Signup and view all the answers

    What is formed when two iodine atoms share one electron with each other?

    <p>A single covalent bond (C)</p> Signup and view all the answers

    What is the purpose of determining the valence electrons in an atom's electronic structure?

    <p>To determine the chemical properties of the atom (B)</p> Signup and view all the answers

    How many electrons are represented by the dots around the hydrogen symbol in Lewis notation?

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

    What is represented by the pair of dots between the H and Cl symbols in the Lewis structure of HCl?

    <p>A covalent bond (A)</p> Signup and view all the answers

    How are the valence electrons arranged in Lewis notation for a chlorine atom?

    <p>In pairs at the top, right, and bottom, and a single dot on the left (D)</p> Signup and view all the answers

    What is represented by the dots around the symbol for an atom in Lewis notation?

    <p>The valence electrons of the atom (A)</p> Signup and view all the answers

    In the Lewis notation of a molecule, what does a pair of dots between two atoms represent?

    <p>A shared electron pair (C)</p> Signup and view all the answers

    In the Lewis notation of HCN, how many pairs of dots are placed between the C and N symbols?

    <p>Three pairs of dots (C)</p> Signup and view all the answers

    What is the number of valence electrons represented by the dots around the oxygen atom in the Lewis notation of H₂O?

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

    In the Lewis notation of CO₂, how many pairs of dots are placed between each C and O symbol?

    <p>Two pairs of dots (D)</p> Signup and view all the answers

    What is the type of bond formed when two atoms share four electrons?

    <p>Double covalent bond (B)</p> Signup and view all the answers

    In the Lewis notation of I₂, what is the arrangement of dots around each iodine atom?

    <p>Three pairs of dots (D)</p> Signup and view all the answers

    What is the type of bond formed when two atoms share six electrons?

    <p>Triple covalent bond (B)</p> Signup and view all the answers

    In the Lewis notation of a molecule, what do the dots around the symbol for an atom represent?

    <p>The valence electrons of the atom (D)</p> Signup and view all the answers

    What is the primary purpose of determining the valence electrons in an atom's electronic structure?

    <p>To determine the number of covalent bonds an atom can form (D)</p> Signup and view all the answers

    What is the significance of the outermost energy level in an atom's electronic structure?

    <p>It contains the valence electrons (A)</p> Signup and view all the answers

    How are the valence electrons typically represented in Lewis notation for a chlorine atom?

    <p>With seven dots arranged in pairs and a single dot (B)</p> Signup and view all the answers

    What is the difference between the Lewis structure of a hydrogen atom and a chlorine atom?

    <p>The arrangement of dots around the symbol (D)</p> Signup and view all the answers

    What is the relationship between the number of valence electrons and the number of covalent bonds an atom can form?

    <p>The number of valence electrons determines the number of covalent bonds an atom can form (C)</p> Signup and view all the answers

    What is the significance of the pair of dots between the H and Cl symbols in the Lewis structure of HCl?

    <p>It represents the shared electrons in the covalent bond (A)</p> Signup and view all the answers

    What is the difference between the Lewis structure of a hydrogen chloride molecule and an iodine molecule?

    <p>The type of bond formed (A)</p> Signup and view all the answers

    What is the purpose of representing the remaining valence electrons of an atom in Lewis notation?

    <p>To show the valence electrons that are not involved in bonding (D)</p> Signup and view all the answers

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