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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?

You remember Lewis formulas and VSEPR from the SL section, right? Well, gear up because we&#39;re diving deeper!

<ul>
	<li>Regular Octet Rule: Typically, atoms follow the octet rule and want to be surrounded by 8 valence electrons to be all cozy and stable.</li>
	<li>Expanded Octet: Just when you thought things were predictable, some atoms decide they want MORE than just those 8 valence electrons. They go big, with 10 or even 12 electrons. Why? Because they can! (and because of their d-orbitals, but more on that later).</li>
</ul>

Central atoms in some molecules can rock:

<ul>
	<li>5 pairs of electrons ➔ 10 electrons!</li>
	<li>6 pairs of electrons ➔ 12 electrons!</li>
</ul>

🍭 Real-World Examples (Because who doesn&#39;t love examples?):

<ul>
	<li>Phosphorus Pentafluoride (PF5):

	<ul>
		<li>Imagine Phosphorus (P) at a party. This fella is in the center of the dance floor (making him the central atom) and is surrounded by not 1, not 2, but 5 Fluorine (F) friends. Hence, PF5! 🕺💃</li>
		<li>This molecule has 5 pairs of electrons around phosphorus. That&#39;s a total of 10 electrons.</li>
	</ul>
	</li>
	<li>Tetrachloroiodide Ion (ICl4&minus;):
	<ul>
		<li>Iodine (I) is the star here, hanging out in the center with 4 Chlorine (Cl) pals around it.</li>
		<li>Here, iodine has 6 pairs of electrons. That&#39;s 12 electrons in total!</li>
	</ul>
	</li>
</ul>

Next time you eat candy, think of them as molecules. Which candy represents PF5, with one central piece surrounded by five smaller ones? Maybe a chocolate-covered almond with nuts around it? Use your imagination and eat your study aids afterward!

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Happy Studying! 🚀🔬📚

Unlock Expanded Octets: Structure & VSEPR

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Standard Level

Chemistry SL

Chapter 2 - Models Of Bonding & Structure

Unlock Expanded Octets: Structure & VSEPR

Table of content

Back to basics🎈

The expanded art palette of octets🎨

Unlock the Full Content!

Chapter 2 - Models Of Bonding & Structure

Unlock Expanded Octets: Structure & VSEPR

Table of content

Back to basics🎈

The expanded art palette of octets🎨

Unlock the Full Content!