Final Exams and Video Playlists: www.video-tutor.net/

It's interesting that one guy with a genuine desire to explain this stuff to people does more good than thousands of "professors" put together.

I love this guys explanations so much! He goes slowly and speaks clearly. I also appreciate how he gives a LOT of examples. He is a MUST watch for all chem students. Thanks for helping me pass chem! Can't wait to be done after the final!

26:30 Electronegativity. 34:08 metallic character. 38:21 Ionization Energy. 58:42 electron affinity.

This guy has changed my entire prospective about chemistry..I used to struggle with chemistry and hated it but now it's my favorite subject

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the introduction was crazy, "How can Hydrogen (Atomic Mass = 1) be bigger than Helium (Atomic Mass = 4) when Helium is more mass-ive than Hydrogen." I was glued to the screen after than statement.

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Electronegativity : F > O > N > Cl Electron Affinity : Cl > F > Br > I

Notes (random): Atomic Radii- As you go down a group, the atom adds more energy levels, therefore increasing the atomic radius. According to Coulomb’s law, distance and force of attraction are inversely related. If you increase the distance of the valence electrons to the nucleus, the pull the nucleus has on the valence electrons is reduced. The valence electrons are also repelled by the shielding electrons. Ionic Radii- Cations have less electrons, therefore less electron shells. This makes them significantly smaller than the parent ion. As the size of charge increases, the size of the atom decreases. Anions are larger than the parent atom because there are more electrons. This increases the repulsion, therefore increasing the ionic radius. As you go down a group, the number of electron shells increases, therefore the size of the ion increases. For isoelectronic ions, the ion with the higher amount of protons has the lower ionic radius. As you increase the number of protons in a radius, the FOA between the nucleus and the electrons increases. This pulls the electrons closer together, reducing the size of the atom. Isoelectronic- same number of protons and same electron configurations Electronegativity: -The ability of an atom to attract an electron towards itself -Florine is the most electronegative element (4.0). -Electronegativity increases as you go up a group and towards the right of a period. -Non-metals are more electronegative than metals (higher electronegativities) -Ionization Energy: The ability to remove an electron from a atom. Metals tend to have a lower ionization energy compared to non-metals since they like to loose electrons (become cations). On the other hand, non-metals like to gain electrons (become anions) so it’s harder to take one away. -ionization energy increases as you travel left to right. The electrons stay on the same energy level, however, more protons are being added. This increases the effective nuclear charge, which means the nucleus would have a harder pull on each individual electron. This means more energy would be required to remove a single electron. -As you go down a group, the ionization energy decreases because the distance between the valence electrons and the nucleus is increased. Electron Affinity (kj)- The energy change that occurs after a neutral atom gains an electron

38:21 Ionization Energy

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Professor Organic Chemistry Tutor, thank you for a massive analysis into Ionization Energy , Electron Affinity, Atomic Radius, Ionic Radii, Electronegativity and Metallic Character in AP/General Chemistry. Practice Problems, Visualization, and Drawing the Electron Shells of an element increases my knowledge and deep understanding of the material. This is an error free video/lecture on KZfaq TV with the Organic Chemistry Tutor.

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he's the reason why I'm passing them in uni

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six years later and this is still one of the best ways ppl learn chem. I would not be passing if it weren't for these videos

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Thanks for your easy to understand videos. Periodicity one of the topics I have had difficulties with. Your video is highly appreciated. One of the standardized tests asked the student to predict which element on Periodic Table is likely to be a liquid. Which periodic characteristic is being tested by this question?

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Taking organic chemistry this summer and my professor made me so confused about how the atom works and we have to think outside the box on its fundamental thinking on how and why atom reacts certain ways for protons and the whole thing with the distance and force and number of electrons and I was just not getting it. My proof was too vague and make me have a headache. I thank you for this video and I was able to take notes and understand the concept and the explanation is the best. Very helpful indeed! I'll be reviewing much of my class materials by your videos. :D

26:30 Electronegativity

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58:42- electron affinity

so then if we have B, Te, Ca, Ba, and F, it would be F

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Well done.., but at around 31:00-32:00 u messed things up about electro negativity.....sayin it decreases to the right and increases left wards....but still nice work, learnt so many things from the video...thank u 👍

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Sir, in have really benefited from teachings since I came across your notes on U tube, but sir I really have problem with qualitative analysis in chemistry. I don't know how to identify cation and anion . I really Want you help me out. Thank you best teacher in the world.

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i passed my chem exam. thank you.

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lol i learned more in this video than a month's worth of lectures from my chem teacher

perfect timing for this video :)

31:30 he messed up there, flipped left and right

Thank you for taking the time to explain this!

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Love your videos , but you should really turn up your recording volume. We can always turn it down if its too loud but there is only so far we can turn things up. Im going deaf and its tough to hear without being able to turn up the volume.

25:21 I thought the elements on the right side is larger than the left side. How come the bigger one is mg than o?

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Didn't realize Mark Walberg had a KZfaq channel

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31:45 the electronegativity doesn't decrease as you go from left to right, it increases

this video is so helpful, however it will be better if the speaker/teacher will speak in a more energetic & loud voice so that we'll understand better and enjoy it at the same time. Thank you for this video, TOC! 😊💗

Hello can you help me real quick? Is boron have higher electron affinity than nitrogen or not? 😁

Thank you very much

Thank you so much , your videos are so helpful 🙂❤❤

Which program and equipment are you using to do this tutorial??? I love how you are able to draw and illustrate all of this!

SUPERB LESSON 🙏

Thank you so much for this video, I really learned a lot. But I do have a clarification in 31:13, about the electronegativity trend when the arrow goes to the right, isn't increasing? I was just confused because in the first part in 27:18 you said that it also increases. Thank you.