Chemistry, how do i draw the lewis structures for these molecules?

In summary, drawing Lewis structures for molecules involves representing the bonding and electron arrangement of atoms using symbols and lines. The process involves identifying the central atom, determining the number of valence electrons, and following specific rules for placing electrons and bonding atoms. Multiple bonds and resonance structures may also need to be considered. Practice and understanding of the periodic table and chemical bonding principles are essential for accurately drawing Lewis structures.
  • #1
devanlevin
chemistry, how do i draw the lewis structures for these molecules?

i have tried all sorts of ways but keep on geting stuck with atoms which i can't connect, don't have enough non paired valence electrons to join em all up

H[tex]_{5}[/tex]IO[tex]_{6}[/tex]

TeF[tex]_{6}[/tex]

IF[tex]_{7}[/tex]

SF[tex]_{4}[/tex]

BrCL[tex]_{3}[/tex]
 
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  • #2
SORRY all the numbers are meant to be below the letters, (number of atoms) don't know why it came like that
 
  • #3
This should help:
http://chemlab.truman.edu/CHEM121Labs/MM1Files/LewisDot.htm"
 
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FAQ: Chemistry, how do i draw the lewis structures for these molecules?

What is a Lewis structure?

A Lewis structure is a representation of a molecule that shows the arrangement of atoms and valence electrons. It is named after American chemist Gilbert N. Lewis and is a simple way to visualize the bonding in a molecule.

How do I determine the number of valence electrons for a molecule?

The number of valence electrons for a molecule can be determined by looking at the group number of each atom in the molecule. For main group elements, the group number is equal to the number of valence electrons. For transition metals, the number of valence electrons can be determined by looking at their position on the periodic table.

What is the octet rule and how does it apply to Lewis structures?

The octet rule states that atoms tend to gain, lose, or share electrons in order to achieve a full outer shell of 8 electrons. In Lewis structures, this means that atoms will form bonds with other atoms in order to achieve a total of 8 valence electrons. Exceptions to the octet rule include molecules with an odd number of electrons or molecules with atoms that can accommodate more than 8 valence electrons, such as phosphorus and sulfur.

How do I know which atom is the central atom in a Lewis structure?

In general, the least electronegative atom in a molecule will be the central atom. However, there are some exceptions to this rule, such as hydrogen and halogen atoms, which typically do not act as central atoms. It is also important to consider the overall molecular geometry when determining the central atom.

What is the process for drawing a Lewis structure?

1. Count the total number of valence electrons for the molecule.2. Determine the central atom and arrange the remaining atoms around it.3. Draw single bonds between the central atom and surrounding atoms.4. Distribute the remaining electrons to fulfill the octet rule for each atom (except for hydrogen, which only needs 2 electrons).5. If there are not enough electrons to fulfill the octet rule, try double or triple bonds.6. Check for any formal charges and try to minimize them by moving electrons.7. If a negative ion, add brackets and a negative sign around the structure. For a positive ion, remove electrons from the structure.8. Make sure the total number of electrons used is equal to the total number of valence electrons.

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