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Peace be upon you, and Allah's mercy and
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again with me Udin on the
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Kim Ud channel. The fun of learning chemistry.
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Okay, today's material is preparation for the
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2025 Chemistry TKA. For those of you in
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grade 12, get ready to compete
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in the Chemistry TKA in November 2025
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for grades 10 and 11. Continue following
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the discussion for what? Later in
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your year you will understand. We will
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review starting from grades 10, 11, and 12
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for TKA chemistry material. Let's start with the
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topic of chemical bonds, shall we? This is
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very easy material, but if you don't understand it,
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it will be a blunder for
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all of you. Okay, let's start with the chemical bonding material
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chemical bonds are definitely what we're asking about, if
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not ionic bonds, then covalent bonds. That's right
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, right? Okay, I'll try ionic bonds,
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Ionic bonds, folks. This is the
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easy way, okay? This ionic bond will later
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occur, which is called the
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transfer of electrons.
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Okay. So there are those who give, there are those who
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receive. Yes, hand over, there are those who
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receive. What does surrender mean?
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Let go. What does accepting mean?
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That means he caught it.
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Okay, so someone let go, someone
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caught it. That's the logic. Letting go of
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this tends to make it positively charged.
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If you catch it, it tends to have a
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What is positive called? That is called a
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Okay, that's easy. If it is negative, it is called
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Kon because he let go he was
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a metal. This means that the cation is
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in the form of metal.
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Anions are non-metals.
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ionic bonds occur by transferring electrons in a
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way that one releases electrons, the other
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captures electrons. The one that releases is
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positively charged, the one that catches is
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negatively charged. Positive is called
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a cation, negative is called an anion. Cones
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are metals, anions are nonmetals.
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This means a bond between metal and
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non-metal. Well, that's it, folks.
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Okay, for example, for example, an
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example question, an example question. Okay,
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let's say I have Na and Cl. This is the
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easiest one, yeah. Na is 11,
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If we use the electron configuration
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based on the shell where KLMNO is 2
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8 18 and so on like that, then
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how can we enter this using the electron configuration? 2 8 1. Okay, 2
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+ 8 10 + 1 11. Easy huh. Then
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this one is 2 8 7 lah. It is said to be stable
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if it follows the duplet rule.
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Duplet is 2, octet is 8. Well, if
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we look at 281, to make it stable, then this 1
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must be removed, friends. That means he
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up one electron. Well, that's how it is
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. Next, how would it be nice to make 7
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into 8? So he has to catch it, which
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means he has to catch the electron.
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How many electrons does he have to
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catch? means one electron too.
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Because it is released, it is a metal,
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Well, that's it. The Cl- is
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positive Cl- meets negative because the charges
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are the same, so they will combine and
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Well, NaCl is called an
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Okay, how about another model? Well,
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and Y. Well, that's how it is. X and Y.
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For example, X is 12. Well, for example, Y is
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If we still use the electron configuration method, it's
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Okay, to be stable this has to be released.
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This means it releases two electrons. This one is a
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must catch. So, in order to be an eight,
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how many did he catch? Capture 3
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because it's loose, it means that x will be
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2+. Because catch means y is
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3-. Well, this is still not balanced in
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terms of load. one is 2, the other is 3. So
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to make it even, I multiply this by 3, this
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I multiply by 2. 3 * 2 6 2 * 3 is also 6.
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If you combine these, the index means that
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The bond formed is the same as an ionic bond.
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Okay. The other model is a model that uses an
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orbital configuration. Suppose X,
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other Y is suppose 1s2
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3P5 how do you do it? So,
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can we use this method or
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If you use the fun trick, I will put the
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fun trick here. Well, here's a fun trick
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without using electron configuration. But
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friends, you have to remember that noble gases
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are the cause of the commotion in
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Arab countries due to mine attacks. Okay. How much is
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this? Means two. Memorize it, okay? Memorize.
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54 86. After using this cool trick, it's
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finished. What's the fun trick to
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get close to this number? So
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this is an example. We'll do this straight away, okay? This
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x this y. Let's count now. 2 + 2
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4 + 6 10 + 2 12. So I write 12
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this one. 2 + 2 4 + 6 10 + 2 12 + 5 17.
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Okay, now the fun trick. Let's
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play. 12 is close to what number
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here? Approaching the number 10. 12 - 10
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what? 2 plus. Clever. This means x
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is 2+. Ah, like that. Then 17 is
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close to 18. That means 17 - 18.
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Okay, that means how much? Y-nya min. It's very easy,
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yes. so that it's balanced, this is multiplied by 1,
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this is multiplied by 2. Okay, so if you combine them,
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the formula will be x is 1, y is 2.
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Positive meets negative, so the bond
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is ionic. Ah, like that. This original trick is
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easy to use later for
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your very large numbers. Suppose
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there are other examples later,
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for example X Y, friends. It really saves
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time, huh? For example, I give this 56
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, for example, this 83.
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Imagine friends, 56 using an
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electron configuration like this 28 and
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so on, it will take a very long time. So the
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UD team used this fun trick, namely
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approaching the noble gases.
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For friends who want to discuss the
8:52
preparation of TKA chemistry, later you can have a
8:56
private online meeting with Kim UD,
8:58
the time is flexible. Please
9:00
contact the contact number in the description later if
9:04
you want to deepen your term starting
9:06
from now so that your TKA
9:09
chemistry score will be good, especially for those majoring in
9:11
medicine so that later you can
9:14
control other scores.
9:18
If Kim's grades are good, then his chances of
9:20
being accepted into junior high school are also good.
9:23
Therefore, prepare your foreign workers starting
9:25
now. Don't forget, the
9:28
private online mode is now open. Friends
9:30
who want to register, please contact the
9:34
contact person in the description
9:37
immediately. Later, the time will be flexible
9:40
according to your friends' requests
9:42
to discuss class 10, class 11,
9:45
or class 12 material, it's up to you. yes,
9:48
chemistry TKA materials. Okay, let's
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56 close to how much? Approaching 54. This
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means that 56 - 54 means that x
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is 2 + 83 approaching 86. 83 - 86
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means min. This means that y is 3-
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so that this is balanced, it is multiplied by 3, multiplied by 2.
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So what will the formula be? x3
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Okay, this is still an ionic bond. Later we will
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continue with covalent bonds, coordinate covalent bonds
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, molecular shapes and
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so on. Okay, keep up the good work. Greetings of
10:29
success from Kim Bud. The fun of learning
10:32
chemistry. Asalamualaikum warahmatullahi
