Write the Lewis dot structure for ?

Deana

Concept:

Lewis dot structure is basically a simplified representation of the structure of any molecule or atom. Lewis structure shows the bonding between the atoms and the lone pairs of electrons as dot.

The steps to draw Lewis structure of any molecule are as follows:

1. Write the letter symbol for each element present in the compound and draw the skeletal structure. Generally, least electronegative element is considered as the central element.

2. Count the total number of valence electrons in the molecule. In case of charged molecules subtract the positive charge from the total number of valence electrons and add the negative charge to the total number of valence electrons.

3. Assign two electrons between two atoms and join them via single bond. Place the remaining valence electrons as lone pairs such that octet of each element is achieved. Use multiple bonds to complete the octet.

Solution:

Step 1: The letter symbol for carbon is ‘C’ and hydrogen is ‘H’. Hydrogen is less electronegative than oxygen but hydrogen is not considered as the central atom. The skeletal structure of  is as follows:

Step 2: The electronic configuration of hydrogen is . The number of valence electrons for the hydrogen atom is 1. The electronic configuration of carbon is . The number of valence electrons for carbon atom is 6.

The total number of valence electrons in are calculated as follows:

Step 3:  Distribute the valence electrons around hydrogen and carbon atoms such that the octet for each atom is satisfied.

The octet of each atom is complete. Lewis structure of  is as follows:

Similar problems:

Question:

Write the Lewis dot structure for ?

Solution:

Step 1: The letter symbol for carbon is ‘C’. The skeletal structure of  is as follows:

Step 2: The electronic configuration of carbon is . The number of valence electrons for carbon atom is 4.

The total number of valence electrons in are calculated as follows:

Step 3:  Distribute the valence electrons around carbon atoms such that the octet for each atom is satisfied.

The octet of each carbon atom is complete. Lewis structure of  is as follows:

Question:

Write the Lewis dot structure for ?

Solution:

Step 1: The letter symbol for oxygen is ‘O’. The skeletal structure of  is as follows:

Step 2: The electronic configuration of oxygen is . The number of valence electrons for oxygen atom is 6.

The total number valence electrons in are calculated as follows:

Step 3:  Distribute the valence electrons around oxygen atoms such that the octet for each atom is satisfied.

The octet of each oxygen atom is complete. Lewis structure of  is as follows:

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Related Questions
2. (11 marks) a) At 400 °C, ammonium iodide decomposes in the following endothermic reaction: NH41(s) + NH3(g) + HI(g) Kp = 0.215 at 400 °C. Write the equilibrium expression for this reaction. 15.0 g of NH4I was placed in an empty 3.0 L flask and heated to 400 °C. What is the partial pressure of NH3 in the flask once the reaction has reached equilibrium? How would the following changes to the equilibrium mixture affect the number of moles of NH3 in the flask and the value of K, once equilibrium is re-established? (Use increase, decrease or stay the same.) Change Effect on moles of NH3 Ke value Increase temperature Increase volume of flask Remove half of HI gas
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