Flag Engineering Entrance Exams> Copper crystallises in fcc with a unit ce...
question mark

Copper crystallises in fcc with a unit cell length of 361 pm. What is the radius of copper atom ?

Jayant Kumar , 11 Years ago
Grade 11
anser 2 Answers
Arun

Last Activity: 4 Years ago

As given that copper crystallizes is FCC lattice (Face centred cubic). In FCC atoms are present on the corners of the cubic, unit cell as well as on the face centres of each face.
The atoms on the face diagonal will be touching each other. Let, the radius of the atom be r and edge length of the cube be a.
Face diagonal of cube =2​a
r+2r+r=2​a
r=42​a​=22​a​=22​361​ pm=128 pm

Vikas TU

Last Activity: 4 Years ago

Edge length = a = 361pm
Radius of Cu = ?
For fcc, r = a√2/4 = 361√2/4 =
= 127.63pm
or, 127pm
So, the correct answer is (a) 127pm

Provide a better Answer & Earn Cool Goodies

Enter text here...
star
LIVE ONLINE CLASSES

Prepraring for the competition made easy just by live online class.

tv

Full Live Access

material

Study Material

removal

Live Doubts Solving

assignment

Daily Class Assignments


Ask a Doubt

Get your questions answered by the expert for free

Enter text here...

question mark
consider the figure of a single riveted lap joint as follows
engineering entrance exams
0 Answer Available

Last Activity: 2 Years ago

question mark
Hello, Can we learn and prepare for MHT-CET online ?
engineering entrance exams
0 Answer Available

Last Activity: 3 Years ago