Periodicity: Ionisation Energy | A-level Chemistry | OCR, AQA, Edexcel

[@chelseanamuddu3033]

Somebody give this girl a hug 🤗. Thank you so much.

[@arinarahman3758]

I would

[@jenicejacob8786]

You are so good at teaching and your videos are so helpful

[@abdulaleemgaad3140]

Such a wounderful explanation,very helpful,Thank u,Keep uploading.

[@shanechivese22]

Had to slow down the playback speed

[@samejom]

Concise.Much appreciated.

[@diafrr]

Omg you explain so good lol I had psychology test on Sunday so was revising for that before and on Tuesday have Chem test and 1 day before watching your vids and damn this is helpful

[@jamesshek4441]

Can we talk about atomic size for magnesium and sodium and the trend going downwards?

[@azeemhassan3006]

7:59 successive ionization energy

[@leena9708]

Very helpful! Thank you very much

[@nesryncollins1468]

i’m stuck on why there is a jump between group 2 and 3 & group 5 and 6 can you please go over it

[@aliceb4287]

The jump from group 2 to 3 is because the extra electron in group 3 is in the p orbital, slightly further from the nucleus and somewhat screened by the s orbital, resulting in a lower ionisation energy. The jump from group 5 to 6 is because while the extra electron in group 6 has the same amount of shielding, it is paired in an orbital, and electron pairs repel so it requires less energy to remove it as it already repelled.

[@hashizak3252]

Alice Barrell why doesn’t it decrease again between 6 and 7 then

[@dilanpatel9649]

​@@hashizak3252 Its coz there is an extra proton added.more detail>. You may wonder why energy still decreased form group 5 to 6 although an extra proton was added. It is because the repelling electron are a NEW FACTOR from lets say nitrogen (a group 5 element) to oxygen (a group 6 element) so the new repulsion factor is able to over come the effect of the extra proton. However the ionisation energy form oxygen (a group 6 element) to fluorine (a group 7 element) ionisation energy increases because there are NO NEW FACTORS that would CAUSE A DECREASE IN IONISATION ENERGY but there is the extra proton which is A FACTOR THAT INCREASES IONISATION ENERGY. So the basically there are NO NEW FACTORS contributing to a decrease in energy as the repulsion isn't a new factor from group 6 to 7 and the only factor that would effect ionisation energy is a proton that increases ionisation energy coz there is an extra positive charge so electrons will be attracted to the more positive nucleus.

[@yourfavouritescepticx8969]

Is it always the removal of electrons from gaseous elements though ?

[@ashleighgordon5832]

Yes

[@chelseanamuddu3033]

If the element is not gaseous, it is vaporised first to make it gaseous by supplying heat of vaporisation or sublimation energy.

[@dharlaauguste159]

loved this soo muchhhhh

[@azeemhassan3006]

luved it

[@interpolfan04]

can't lie i was having a bit of a meltdown about ionisation energy but that was before i discovered your channel! i might actually stand a chance of passing chemistry now 😂

[@ahmadsajidyearl621]

life saver

[@charliec.1180]

I’m stuck on why there’s an increase in ionisation energy (in sodium) with the 2-9th electrons. Surely it would be the same ionisation energy as it’s part of the same quantum shell, or even decrease as the effectiveness of electron shielding would be greater? Please can someone explain, I’m sure I’m going to kick myself for being stupid once I know the answer! Edit: about to kick myself now lol. Is my answer this 14:29

[@chikumbutsomzumara1977]

helpful

[@sachachoi6920]

Hasn't lithium got 4 neutrons. 7-3 = 4, Unless you are taling about an isotope of lithium

[@sophiebillups4335]

what does she mean when she says species?

[@sinmiadenuga4961]

Ion (cation in that case)

[@naturesgirl3078]

Miss you are talking really fast

[@mohamedsalah5726]

Welcome to A level lmao

[@naturesgirl3078]

@@mohamedsalah5726 😂😂😂😂 true

[@immy2750]

If you need to slow her down, you can click the three dots in the upper right corner and click speed and change it on your phone. If you’re on a laptop click the settings>speed>then change it.

[@uthmanrashad775]

Yh but for revision you can speed it up

[@samuraipegasus326]

cool

[@ewelinarogiewicz6311]

It is too fast but It isn't too bad .however,It is so expensive to subscribe the whole course so I didn't.