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 COâ‚‚?

  • 2 (correct)
  • 4
  • 3
  • 1

How many valence electrons does the oxygen atom have in the Hâ‚‚O 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 Iâ‚‚?

<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 Iâ‚‚?

<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 Hâ‚‚O?

<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 COâ‚‚?

<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 Iâ‚‚?

<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 COâ‚‚ 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 Hâ‚‚O?

<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 COâ‚‚ 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 Iâ‚‚?

<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 Hâ‚‚O?

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

In the Lewis notation of COâ‚‚, 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 Iâ‚‚, 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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