Draw the electron dot structure of Hexane Heptane Octane Nonane Decane

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Draw the electron dot structure of Hexane Heptane Octane Nonane Decane

The Correct Answer and Explanation is:

To draw the electron dot structures (also known as Lewis structures) for alkanes like hexane, heptane, octane, nonane, and decane, we follow these steps:

Steps to Draw the Electron Dot Structures:

  1. Identify the molecular formula of each compound.
  2. Determine the number of valence electrons for each atom.
  3. Connect atoms with single bonds (since alkanes only have single bonds).
  4. Distribute the electrons to satisfy the octet rule (8 electrons in the outer shell of each atom, except for hydrogen, which only needs 2).
  5. Check for any lone pairs that are left on non-hydrogen atoms.

Electron Dot Structures for the Alkanes:

1. Hexane (C6H14)

  • Molecular formula: C6H14
  • Structure: Hexane consists of six carbon atoms connected by single bonds, with enough hydrogen atoms to make each carbon atom follow the octet rule.
  • Electron dot structure: mathematicaCopyEditH H H H H H | | | | | | H-C-C-C-C-C-C-H | | | | | | H H H H H H

2. Heptane (C7H16)

  • Molecular formula: C7H16
  • Structure: Heptane consists of seven carbon atoms connected by single bonds, with sufficient hydrogen atoms attached to each carbon.
  • Electron dot structure: mathematicaCopyEditH H H H H H H | | | | | | | H-C-C-C-C-C-C-C-H | | | | | | | H H H H H H H

3. Octane (C8H18)

  • Molecular formula: C8H18
  • Structure: Octane consists of eight carbon atoms connected by single bonds, each carbon saturated with hydrogen atoms.
  • Electron dot structure: mathematicaCopyEditH H H H H H H H | | | | | | | | H-C-C-C-C-C-C-C-C-H | | | | | | | | H H H H H H H H

4. Nonane (C9H20)

  • Molecular formula: C9H20
  • Structure: Nonane consists of nine carbon atoms connected by single bonds, each carbon atom fully saturated with hydrogen.
  • Electron dot structure: mathematicaCopyEditH H H H H H H H H | | | | | | | | | H-C-C-C-C-C-C-C-C-C-H | | | | | | | | | H H H H H H H H H

5. Decane (C10H22)

  • Molecular formula: C10H22
  • Structure: Decane consists of ten carbon atoms connected by single bonds, and each carbon atom is bonded to enough hydrogen atoms to satisfy the octet rule.
  • Electron dot structure: mathematicaCopyEditH H H H H H H H H H | | | | | | | | | | H-C-C-C-C-C-C-C-C-C-C-H | | | | | | | | | | H H H H H H H H H H

Explanation:

  • Alkanes: These are hydrocarbons consisting of only carbon and hydrogen atoms, where carbon atoms are connected by single bonds (C-C), and each carbon atom is bonded to enough hydrogen atoms to satisfy the octet rule.
  • Valence Electrons: Carbon has 4 valence electrons, and hydrogen has 1. Therefore, in alkanes, each carbon will form four bonds, and hydrogen will form one bond.
  • The above structures show how the carbon atoms in these molecules are connected linearly, with hydrogens completing the bonding to satisfy the valency of carbon and hydrogen.

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