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![[Post New]](/templates/default/images/icon_minipost_new.gif) 6 Mar 2008 22:42:53 IST
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silver has an atomic radius of 144pm and the density of silver is 10.6g/cm^-3..
to which type of cubic crystal silver belongs to???????
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so, we love all. |
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6 Mar 2008 22:48:54 IST
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apply the formula....
density = (z*a)/(N*v)
z=no. of particles in unit cell
a=atomic mass fr silver
N= avogadro's no.
v=volume of unit cell=(radius)^3
d=density
calculate z....
z=1 primitive
z=2 bcc
z=4 fcc
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"Many of the things you can count,dont count....
Many of the things you cant count,really do count...."-Albert Einstein
"The important thing in science is not so much to obtain new facts as to discover new ways of thinking about them"-William Bragg
"An inexplicable fact is infinitely preferable to an incomprehensible mystery"-F. Soddy
RISHIPRATIM MAZUMDAR
NIT DURGAPUR
1ST YEAR,ELECTRONICS AND COMMUNICATIONS
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6 Mar 2008 22:54:11 IST
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thanks dear
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7 Mar 2008 19:45:30 IST
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wait i have a doubt?????
how to take the volume????????
why have u considered the given radius as the unit cell edge length???????
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this word is so small that it is a foolishness to hate anyone.
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7 Mar 2008 21:53:06 IST
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volume here will be edge length cube...take it as p
apply density now
and then find relation between r and p
this gives type of cubic metallic crystal
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7 Mar 2008 22:45:27 IST
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yeah...dat ws a lil bit stupid of me.....
i meant vol=edge length cube.....
xtremely sorry 4 dat.....
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"Many of the things you can count,dont count....
Many of the things you cant count,really do count...."-Albert Einstein
"The important thing in science is not so much to obtain new facts as to discover new ways of thinking about them"-William Bragg
"An inexplicable fact is infinitely preferable to an incomprehensible mystery"-F. Soddy
RISHIPRATIM MAZUMDAR
NIT DURGAPUR
1ST YEAR,ELECTRONICS AND COMMUNICATIONS
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7 Mar 2008 22:48:13 IST
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dat way,u can calculate the edge length from the above equation....
thn if edge length = 2r primitive
= (root 2)r - fcc
= (root 3)r - bcc
where r is the radius of the atom of silver.
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"Many of the things you can count,dont count....
Many of the things you cant count,really do count...."-Albert Einstein
"The important thing in science is not so much to obtain new facts as to discover new ways of thinking about them"-William Bragg
"An inexplicable fact is infinitely preferable to an incomprehensible mystery"-F. Soddy
RISHIPRATIM MAZUMDAR
NIT DURGAPUR
1ST YEAR,ELECTRONICS AND COMMUNICATIONS
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