Ask a Doubt
Request a call back

Join NOW to get access to exclusive study material for best results

CBSE Class 12-science Answered

In a cubic lattice A atoms having FCC arrangement B atoms are at body centers and C atoms are at alternate edge centers . The formula of the unit cell will be ;  
Asked by prakriti12oct | 05 Aug, 2019, 12:08: AM
Expert Answer
We know that,  Number of atoms in FCC arrangement =4
                       Number of atoms in BCC arrangement=2
 
There are 12 edges in a cubic structure and contribtion of atom on each edge is 1/4
S o space N u m b e r space o f space a t o m s space i n space a l t e r n a t e space e d g e equals 1 fourth cross times 6 space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals 3 over 2 N u m b e r space o f space a t o m s space o f space A equals 4 N u m b e r space o f space a t o m s space o f space B equals 2 N u m b e r space o f space a t o m s space o f space C equals 3 over 2 S o space f o r r u l a space w i l l space b e colon A subscript 4 B subscript 2 C subscript bevelled 3 over 2 end subscript equals A subscript 8 B subscript 4 C subscript 3
Answered by Ravi | 13 Aug, 2019, 11:09: AM

Concept Videos

Multiple Choice Questions Practice Test Subjective Questions Webinar Subjective Questions Pre Board Assessment
Answered Unanswered My Questions My Answers
CBSE 12-science - Chemistry
what is solid
Asked by harshul2019 | 25 May, 2022, 08:52: PM
ANSWERED BY EXPERT
CBSE 12-science - Chemistry
The unit cell of Na is bcc and its density is 0.97. What is the radius of a sodium atom if the molar mass of Na is 23?
Asked by arushidabhade | 17 Mar, 2021, 01:24: PM
ANSWERED BY EXPERT
CBSE 12-science - Chemistry
explain please
Asked by kasthurikalvi | 16 Sep, 2020, 03:46: PM
ANSWERED BY EXPERT
CBSE 12-science - Chemistry
pls solve sir
Asked by sulaikhasulu393 | 01 Jul, 2020, 10:08: PM
ANSWERED BY EXPERT
CBSE 12-science - Chemistry
How many types of 3dimensions are there in a lattice please define.  
Asked by anukritisingh8103.bmps | 18 May, 2020, 03:00: PM
ANSWERED BY EXPERT
CBSE 12-science - Chemistry
sir in types of unit cell we studied it can be of 4 types i.e primitive, face centred, body centred and end centred, but while studing 3D close packing it was told that it can be of 3 types i,e. simple(primitive) cubic unit cell, hcp and ccp. but i am not able  to understand that hcp is a type of unit cell or it is one of the 7 crystal system or somthing else?and if it is type of unit cell then why it is not taught under the topic types of unit cell. and if it is a crystal system then what about the rest 6 crystal system, then why rest 6 crystal system does not comes under 3 dimensional close packing?
Asked by rohitraman1115 | 10 Sep, 2019, 07:10: PM
ANSWERED BY EXPERT
CBSE 12-science - Chemistry
In a cubic lattice A atoms having FCC arrangement B atoms are at body centers and C atoms are at alternate edge centers . The formula of the unit cell will be ;  
Asked by prakriti12oct | 05 Aug, 2019, 12:08: AM
ANSWERED BY EXPERT
CBSE 12-science - Chemistry
The number of c4 and c3- axes in a cubic crystal lattice are x and y respectively the value of x+y= a] 2 b] 7
Asked by prakriti12oct | 04 Aug, 2019, 09:06: PM
ANSWERED BY EXPERT
CBSE 12-science - Chemistry
Hexagonal close packing and cubic close packing
Asked by ranasingh04082002 | 31 Jul, 2019, 02:04: PM
ANSWERED BY EXPERT
CBSE 12-science - Chemistry
Analysis shows that nickel oxide has the formula ni 0.98 o1.00. What fractions of nickel exist as ni 2+ and ni 3+ ions?
Asked by Saransekar407 | 11 Mar, 2019, 06:51: PM
ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt