Shielding effect and lanthanide contraction

Shielding effect and lanthanide contraction
What is the shielding effect?
What is an effective nuclear charge?
What is lanthanide contraction?
How does shielding effect cause lanthanide contraction?
What is the order of shielding efficiency?
To watch video on 'What is the (n+l) rule in chemistry?' click on • What is the (n+l) rule...
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[@Dharun-ge2fo]

Thank you mam

[@generalkorbus42]

thanks a lotttt!!!! cleared all my doubts!

[@ChemistryNotMystery]

Happy to hear that

[@noorarshiya4392]

In the ncert it speaks that the reason for lanthanoid contraction is poor shielding effect of one 4f e by another in same subshell for lanthanoid contraction, can you please elaborate it

[@ChemistryNotMystery]

4f orbitals are diffused in shape (l=3), that's why they poorly shield other electrons. So that nucleus will be able to pull them closer.

[@iamheretoo4383]

Thanks a lot mam, I got it really clear!!!!! 😊

[@ChemistryNotMystery]

Thank you so much

[@kavyaprabakaran8331]

Thanks for a crystal clear explanation mam😇

[@ChemistryNotMystery]

You're welcome

[@kritikadalal9218]

Very helpful . Nice explanation.

[@ChemistryNotMystery]

You're welcome ☺️

[@Rambhakt9861]

Mam sound is not clear
But u explain very good way
Tq mam

[@ChemistryNotMystery]

Sorry for the sound. Please try in a better network.

[@vanaparthisuhas7882]

Nice mam thank u for explaining us

[@ChemistryNotMystery]

Most welcome 😊

[@Learnwithlearners7704]

Thank you so much ma'am 😊😊

[@keet.6562]

Madam I luv u from the shielding effect thing

[@thatonecommentor7758]

So as l increases, the shielding effect decreases because of nodes which allow the electrons more attraction to the nucleus?

[@ChemistryNotMystery]

Yes

[@thatonecommentor7758]

@@ChemistryNotMystery Thank you! Quick question, though. Since the s-orbital has a node after every energy level, why would it be the most efficient at shielding? Thank you for your time and help!

[@ChemistryNotMystery]

@@thatonecommentor7758 As compared to others, s orbital shields better. No of nodes increases with increase in principal quantum no, and it is true to every orbital.

[@thatonecommentor7758]

@@ChemistryNotMystery Thank you for your help!

[@praveen3669]

Why the contraction in size across the 4th period is larger mam?

[@ChemistryNotMystery]

Because of weak shielding of d orbitals. Nucleus pull the outer electrons strongly and causes contraction in size.

[@fuzzyfun2]

perfect 👌🏻

[@johniscool-nu4he]

even teachers forget about this

[@alltypes0667]

Phla vedio jisne lanthanoid contraction samjhaya

[@ChemistryNotMystery]

Happy to hear that 😊

[@amanda_dela]

thank you madam

[@ChemistryNotMystery]

Welcome 😊

[@Pratik2079]

But i think chemistry is mistery 😂.

[@ChemistryNotMystery]

Yeah, until you don't understand it.

[@riteshsharma1402]

👏👏👏

[@rosemarychacko3690]

Thank u mam

[@ChemistryNotMystery]

Most welcome 😊