Lewis Structure Worksheet 1 Answers Key

Lewis Structure Worksheet 1 Answers Key

The Lewis structure, also known as the electron dot structure, is a graphical representation of the bonding between atoms in a molecule. It is a fundamental concept in chemistry and is used to describe the arrangement of electrons in a molecule. In this answer key, we will go through the answers to Lewis Structure Worksheet 1.

What is a Lewis Structure?

A Lewis structure is a diagram that shows the bonding between atoms in a molecule. It is a two-dimensional representation of the molecule, with atoms represented by their chemical symbols and electrons represented by dots.

How to Draw a Lewis Structure

To draw a Lewis structure, follow these steps:

• Determine the total number of valence electrons in the molecule.
• Determine the central atom (usually the least electronegative atom).
• Determine the number of electrons needed to complete the octet of each atom.
• Draw single bonds between the central atom and the surrounding atoms.
• Add electrons to the surrounding atoms to complete their octets.
• Add electrons to the central atom to complete its octet.

Lewis Structure Worksheet 1 Answers

Here are the answers to Lewis Structure Worksheet 1:

Problem 1: CH4

The Lewis structure for CH4 is:

H - C - H

| |

H H

Total valence electrons: 8

Central atom: C

Electrons needed to complete octet: 4

📝 Note: The carbon atom has four single bonds to hydrogen atoms, which complete its octet.

Problem 2: NH3

The Lewis structure for NH3 is:

H - N - H

| |

H (pair of electrons)

Total valence electrons: 8

Central atom: N

Electrons needed to complete octet: 3

💡 Note: The nitrogen atom has three single bonds to hydrogen atoms and a lone pair of electrons, which complete its octet.

Problem 3: H2O

The Lewis structure for H2O is:

H - O - H

| |

(pair of electrons) (pair of electrons)

Total valence electrons: 8

Central atom: O

Electrons needed to complete octet: 2

🌊 Note: The oxygen atom has two single bonds to hydrogen atoms and two lone pairs of electrons, which complete its octet.

Conclusion

In conclusion, the Lewis structure is a powerful tool for understanding the bonding between atoms in a molecule. By following the steps outlined above, you can draw the Lewis structure for a given molecule. The answers to Lewis Structure Worksheet 1 are provided above.

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