Chemistry SL
Chemistry SL
6
Chapters
243
Notes
Chapter 1 - Models Of The Particulate Nature Of Matter
Chapter 1 - Models Of The Particulate Nature Of Matter
Chapter 2 - Models Of Bonding & Structure
Chapter 2 - Models Of Bonding & Structure
Chapter 3 - Classification Of Matter
Chapter 3 - Classification Of Matter
Chapter 4 - What Drives Chemical Reactions?
Chapter 4 - What Drives Chemical Reactions?
Chapter 5 - How Much, How Fast & How Far?
Chapter 5 - How Much, How Fast & How Far?
Chapter 6 - What Are The Mechanisms Of Chemical Change?
Chapter 6 - What Are The Mechanisms Of Chemical Change?
IB Resources
Chapter 2 - Models Of Bonding & Structure
Chemistry SL
Chemistry SL

Chapter 2 - Models Of Bonding & Structure

Mastering Lewis Formulas: The Key to Molecular Structures

Word Count Emoji
640 words
Reading Time Emoji
4 mins read
Updated at Emoji
Last edited on 5th Nov 2024

Table of content

Hey there, future chemist! We're going to talk about Lewis formulas and how they visualize the bond-erful world of molecules. Yep, you read that right. It's all about the bonds today!

Lewis formulas - a love story of electrons

Lewis formulas are like molecular selfies, showing the world how atoms in a molecule are bonded together and how valence electrons - the outermost electrons that love to form bonds - are arranged. In these selfies, the electrons are represented as dashes, dots, or crosses.

 

Let's take a look at fluoroamine, NH2F. It's a fun molecule with some crazy electron patterns. Remember these rules while drawing Lewis formulas:

  • Only the cool, outgoing valence electrons get to be in the selfie.
  • These electrons like to hang out in pairs.
  • When two atoms share an electron pair, they're bonded! It's like them saying, "We're besties!"
  • The shared electron pairs (bonding electrons) chill between the atoms, like a secret handshake.
  • The electrons who prefer solitude (non-bonding or lone pairs) stay away from this bonding region. They're like, "Nah, we're good."

Noble gas envy - the octet rule

Most atoms want to be like the noble gases, who are the cool kids of the periodic table. Noble gases have full octets (eight valence electrons), so they're pretty stable and don't like to share, lose or gain electrons. Hence, atoms in Lewis formulas often have noble gas configurations. This is known as the octet rule.

 

But like all rules, there are exceptions. Sometimes, atoms can form stable molecules with fewer or more than eight electrons. And sometimes, even the noble gases decide to bond. So, the octet rule is a helpful guide, but it's not always the final word!

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IB Resources
Chapter 2 - Models Of Bonding & Structure
Chemistry SL
Chemistry SL

Chapter 2 - Models Of Bonding & Structure

Mastering Lewis Formulas: The Key to Molecular Structures

Word Count Emoji
640 words
Reading Time Emoji
4 mins read
Updated at Emoji
Last edited on 5th Nov 2024

Table of content

Hey there, future chemist! We're going to talk about Lewis formulas and how they visualize the bond-erful world of molecules. Yep, you read that right. It's all about the bonds today!

Lewis formulas - a love story of electrons

Lewis formulas are like molecular selfies, showing the world how atoms in a molecule are bonded together and how valence electrons - the outermost electrons that love to form bonds - are arranged. In these selfies, the electrons are represented as dashes, dots, or crosses.

 

Let's take a look at fluoroamine, NH2F. It's a fun molecule with some crazy electron patterns. Remember these rules while drawing Lewis formulas:

  • Only the cool, outgoing valence electrons get to be in the selfie.
  • These electrons like to hang out in pairs.
  • When two atoms share an electron pair, they're bonded! It's like them saying, "We're besties!"
  • The shared electron pairs (bonding electrons) chill between the atoms, like a secret handshake.
  • The electrons who prefer solitude (non-bonding or lone pairs) stay away from this bonding region. They're like, "Nah, we're good."

Noble gas envy - the octet rule

Most atoms want to be like the noble gases, who are the cool kids of the periodic table. Noble gases have full octets (eight valence electrons), so they're pretty stable and don't like to share, lose or gain electrons. Hence, atoms in Lewis formulas often have noble gas configurations. This is known as the octet rule.

 

But like all rules, there are exceptions. Sometimes, atoms can form stable molecules with fewer or more than eight electrons. And sometimes, even the noble gases decide to bond. So, the octet rule is a helpful guide, but it's not always the final word!

Unlock the Full Content! File Is Locked Emoji

Dive deeper and gain exclusive access to premium files of Chemistry SL. Subscribe now and get closer to that 45 🌟