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Chapter 2 - Models Of Bonding & Structure

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Atom Symbol

Chapter 1 - Models Of The Particulate Nature Of Matter

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 Globe with Meridians

Chapter 3 - Classification Of Matter

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Fire

Chapter 4 - What Drives Chemical Reactions?

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Rocket

Chapter 5 - How Much, How Fast & How Far?

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Test Tube

Chapter 6 - What Are The Mechanisms Of Chemical Change?

Hello Chemistry Cadets! Strap in, as we take a journey into the incredible world of molecules, exploring their shapes and structures. Today, our stop is the &quot;Trigonal Planar&quot; territory! 🛸🌐

Picture a triangle lying flat on a table - that&#39;s the idea! A molecule with a &quot;Trigonal Planar&quot; electron domain geometry has three bonding domains, positioned 120&deg; apart from each other. These domains form a flat, triangle shape - hence the name: &#39;Trigonal&#39; for triangle and &#39;Planar&#39; because they&#39;re chilling on a plane.

Just like us, the Trigonal Planar geometry has different moods - it can have two molecular geometries! 😃😕

<ul>
	<li>The Chilled-Out Mood - When all three domains are bonding domains, they are like best buds, sticking together in a trigonal planar arrangement. A real-world example? Boron Trifluoride (BF3) loves this configuration!</li>
	<li>The Bent Mood - Sometimes, two of the domains are bonding, but one decides to be different - a non-bonding domain! This results in a bent, or V-shaped geometry. Imagine a &quot;peace&quot; ✌️ sign - that&#39;s your molecule! An example here is our friend Nitrogen Dioxide (NO2).</li>
</ul>

In the wild world of chemistry, rules are often bent (pun intended!) 🤓. The bond angle in NO2- is smaller than the expected 120&deg;. Why? Because the lone ranger (non-bonding pair) likes to spread out, exerting a stronger repulsion and taking up more room, like a cat stretching on your keyboard!

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Key Takeaway: The shape of a molecule doesn&#39;t just depend on the number of bonding domains, but also on the presence of non-bonding domains. Their influence can even cause molecules to &quot;bend&quot; their usual rules!

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Keep exploring these molecular geometries - they&#39;re key in understanding how molecules interact and function in the world around us, from the water we drink to the air we breathe. Until next time,

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Happy Studying! 🔬📚🎉

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Trigonal Planar Geometry: Unraveling Bonding Domains

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Standard Level

Chemistry SL

Chapter 2 - Models Of Bonding & Structure

Trigonal Planar Geometry: Unraveling Bonding Domains

Table of content

Trigonal planar - what's that?

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Chapter 2 - Models Of Bonding & Structure

Trigonal Planar Geometry: Unraveling Bonding Domains

Table of content

Trigonal planar - what's that?

Unlock the Full Content!