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Arrange these elements according to electron affinity:Most energy released by gaining an electronMost energy absorbed by gaining an electronAnswer BankClBHe...

Question

Arrange these elements according to electron affinity:Most energy released by gaining an electronMost energy absorbed by gaining an electronAnswer BankClBHe

Arrange these elements according to electron affinity: Most energy released by gaining an electron Most energy absorbed by gaining an electron Answer Bank Cl B He



Answers

Arrange the elements in each of the following groups in increasing order of the most positive electron affinity:$ (a) Li, Na, K; (b) F, Cl, Br, I; (c) \mathrm{O}, \mathrm{Si}, \mathrm{P}, \mathrm{Ca}, \mathrm{Ba}$

Hello, sir. In this when we were asked to order the electron affinity and just a general rule electron affinity decreases. This would go down the, um call him as we go down, a calm and I just want Teoh bring to our attention. Pretty much. We will find that if you do generally as we move up, though, as we move down, the electron affinity will decrease. Therefore, free move up will increase, though, for a question A Oh, sorry, Question A. Will you find that potassium? I have less of an electron affinity than sodium and the less than affection affinity than lithium. And this is due to because we get closer to the nucleus and we see that the nucleus has ah is able to bring in more electrons and reach out to more electrons. Next, we move up to find, um and we move and follow the same trend as we walk into a column ID. I'm has the lowest electron affinity, then, bro it then this is just a general rule of thumb flooring. This is an exception to the rule and then chlorine. I know this is a little bit confusing, but it's just very crucial to remember this part. Thank you. And good luck.

All right, guys, we're gonna do problem. 1 27 Chapter seven or the EMS in each of the following sets from Lee Sex with ERM against you the most. So remember, uh, exit XO. Thermic energy becomes electron fitting becomes, uh, more except thermic as you go. Sort of top grade Apirak table. So the first pair is selenium and sulfur. So where's the bus, Liam? So it has a has a more Exeter Mike Elektronik affinity. Next we have of the hell Jin's flooring, chlorine burning and hiding. So we just go by the periodic table track, we can go. So Romi is above id'ing, so it's gonna have a high, higher electron affinity. Hey, chlorine is above bro means so it's gonna have a higher electron affinity. And ah, flooring is actually defies this trend because flooring actually has a is electrifying is less. It was actually a let's accept thermic dang than, ah, then chlorine. You would assume that Florence with the highest ah, electron affinity, but it actually turns out to be the chlorine. And the reason for that is just because is that chlorine is very small. Eight. Remember your cook as you goto up towards the pier at table. Your electron affinity will electron affinity. Well, you're like Anthony will become more experiment, and you're at how McGrady's will also decrease. So remember electronic Phineas Electron affinity is the the affinity of an electron to take in. And sorry, the affinity of an anti taken another electron. So you have eso flooring a smaller So the so. Because of that, the electron cloud is a higher charged density because your electrons are packed more close again that Adam has post to quarry the things you elect Singer of a higher charge density, it does. You're gonna have strong, repulsive interactions between your electron cloud and the electron you want to add to it. That's why flooring defies the trend.

Podcast. Siri's. We're taking a look at electron configuration. So the electron configuration, often element, is very useful at telling us chemical as well as physical properties that that element may possess and may present in reactions. So what we're doing here is writing out some electron configurations. So the fast on we have helium have a said value of too. We have won us to. Next. We have potassium, 19 electrons to fill one. Us too. To us to to be 63 s to three piece 64 s one Following this we have cobalt. That's 27. Want us to to us to two p six. Three s, 23 p 64 us to three deep. 10. Next we have sofa that it's 16. That is one US to to us to two p six, three years to three. Peaceful. Following. This we have. Chlorine is our last run where we have 17 electrons to fill. Want us to to us to be 63 s, two on three peat five. So halogen chlorine has a very strong tendency to gain an additional electron. Andi have the following electron configuration. Thus, one electron, we would have one s two to us to two p 63 s to three p six. And so what you can see is that we would have a full valence shell so we would have noble gas configuration.

In this example, we're going to take a look at um some ionization energy questions utilizing the periodic table and predict from what we see um in each pair which has a higher uh ionization energy. So generally know this to be true that it was moved left to right across the role in the periodic table tend to see an increase in ionization energy and as we move top to bottom decrease in ionization energy. So in the first set of examples and we've written out the electron configurations here as well. We're going to compare titanium here to vary. Um so titanium um is a transition metal here is going to have um larger effective nuclear charge than berry um um from its placement on the periodic table. And if we look at its electron configuration, we can see titanium has uh outermost electrons, some forests electrons. Um and so comparing that to bury um with a much larger size and 1/6 shell with its valence electrons being six us two electrons. Um you know these feelings electrons are a lot further from the nucleus and will be easier to strip away as a result. And very um has a lower effective nuclear church as well. So for both of those reasons, the titanium here would be the species that we would expect to have the larger ionization energy. We compare silver and copper. They're in the same family of the periodic table and both follow kind of an anomalous electron configuration where Copper has a forest 1, 3 d 10 configuration with our gun um containing those initial core electrons. And silver has krypton five S 1 40 10. And again, um the effective nuclear charges are pretty similar for these two elements because they're in the same family. Copper, slightly higher effective nuclear charge. But the big difference here is the fact that again, the valence electron for silver is in, you know, it has a five S sub shell and it's farther from the nucleus is easier to strip away. Copper closer with that forest electron more difficult to strip away. And as a result, we would expect copper than to have the larger ionization energy in Germany. Um And chlorine get according to a trend you can kind of predict at this point that chlorine is going to have the larger ionization energy also has a larger effective nuclear charge being a halogen. Um And if we look at the electron configurations here, this is actually for chlorine here. We can see again that Its valence electrons are in the 3rd Shell. The valence electrons for the Germanium her in the forests and four p shells. Though they should be easier to strip away then being farther from the nucleus. So, um again, just more evidence of the fact that chlorine should indeed have the higher ionization energy of this pair. A final set compares led to antimony located here on the periodic table. And again, according to the trend, we can already kind of predict here that antimony should have the larger ionization energy. And when we look at um placement on the table, antimony has the higher effective nuclear charge of the pair. So should have a greater hold on its electrons. And as evidence from looking at the electron configurations first for lead, Lead has six s. sub shell and quite a bit of shielding in the way it employs some f sub shell electrons as well. So those six S. And six P electrons are pretty far from the nucleus in lead as opposed to an antimony. Were just utilizing the fifth shell and no F electrons at all. Here should make those electrons little be more difficult to strip away, less shielding, higher effective nuclear charge. And the fifth shell here means closer to the nucleus, more difficult to strip away. So indeed, antimony should have the higher ionization energy of this pair.


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