12C01 - Solid State - Coordination Number of Unit Cell | Simple cube, BCC, FCC

Class 12 Chemistry – The Solid State
We are surrounded by solids. We use solids in our daily life more than liquids and gases. We know solids have high forces of interaction among the particles which makes them rigid which makes them useful in various industries. But are all the particles aligned in same orientation in all solids? Or does the orientation differ? How does orientation of atoms in solid affect is properties? We can answer all these questions after this chapter. We’ll learn
1. What are different types of solids?
2. What are crystalline solids?
3. Effective number of atoms in unit cell.
4. What is coordination number of unit cell?
5. Packing efficiency of different crystals.
6. Density of a crystal.
7. What is Bragg’s law?
8. Different defects in the crystal.
9. Electrical and magnetic properties of solids.

[RahulKumar-ytbg]

Thankyou bhaiya aap mujhe accha se samjha diye ❤❤❤❤❤😊😊😊

[ridhigoel]

Excellent Explanation with 3-D illustrations is so helpful.

[akankshapatil]

I liked your voice. So, I can listen to you for a long time. Great explanation, helped me alot. Thankyouu💗

[satyampandey]

Agar face centre pe atom ka CN nikalna hai to aise hoga:- suppose we are calculating CN of a face-centred atom located at one of the lateral face of the unit cell! Now follow/visualize these steps a) 4 corner atoms of that same face on which centre our Atom is present
b) 4 face-centred atoms of same unit cell 2 face-centred atoms of upper & lower face & 2 face-centred atoms of forward & backward face
c) 4 face-centred atoms of another unit cell having same location as described for the face-centred atoms of same unit cell!
If u understood then like so that I can know!

[akshaychilwal]

Very nicely explained. U contributed to more placid understanding of the arrangement.

[Kajal-typm]

I have a question, ki body centred me centre Wale unit cell pe concentrate kyu kar rahe hai to find coordination no.
Means ki corner Wale unit cell ko bhi toh le sakte hai na.

[gomathisankar]

For body centre, how did u find the coordination number, of corner atom, will it touch the other atom in the same edge sir, please reply / please😥😟

[unknown...]

Sir aapne 2nd mein to unit cell show ki h vo koo crystal to nhi h fir
Tell me pls i m confused

[harshvardhn]

Sir, but how the any other sphere in simple cubic cell has the coordination number of 6?

[rashmipant]

Thank you bhaiya.. It was of great help👏👏

[gsmukherjee]

The structure was moving too much - no need to move so frequently.

[Kmcite-yypl]

Sir face centered cubice lattice me cordination no. 12 hain ....NACL is also fcc but have coordination number 6 why ?

[rekha]

How coordination no 8 at the corner atoms in bcc

[_OmkarPawar]

The definition itself made me revise the whole topic as I had forgot it

[threalbatman]

Wow... This is so smooth.. Excellent work sir

[maithili]

Ur voice is soothing...
Awesome teaching..

[sadacharitiwari]

Too good sir, thankyou very much 👍👍🙏🙏👍👍

[divyanshu_]

Awesome video on YouTube, specially for fcc, but there should be a feature of zoom out and zoom in fcc

[viraj_]

In simple cubic structure the atoms are just on the corners of the cube but the structure you showed has atoms also on the face centres how is that possible..??

[dikshithavenkat]

i have a the beginning you said the effective atom in each unit cell at the corner is 1/8 so it means each corner is in contact with 8 atoms ri8....then how do we say that there are only 6 atoms touching them??