A chemistry problem by pradnya patil

Chemistry Level 1

Tungsten has an atomic radius of 0.136nm.The density of tungsten is 19.4 g /cc. What is the crystal structure of tungsten? (atomic wt. W=184)

none face centered body centered simple cubic

Pradnya Patil by pradnya patil , 22, India

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1 solution

Prince Loomba
Jan 1, 2017

d=ZM/Na×a^3 where Na is avogadro's number, we get Z=2 which is body centered cubic.

1 Helpful 0 Interesting 0 Brilliant 2 Confused

Z=2 no. of Molecules right! so distribution of the molecule to accomodate all the space in a crystal lattice or qube will be 1 complete molecule at centre and other one molecule cut in 4 equal size that is 1/4 th part at the corner of the qube or crystal lattice of tungsten.

we can also make sure of accomodated molecules have been fixed with respective area of qube. That is number of molecule = 1+4*1/4 th part of molecule = 1+1 = 2 molecules of tungsten.

A Former Brilliant Member - 4 years, 5 months ago

Dude we have atomic radius given not the edge length(a)

Kiratmeet Singh - 4 years, 1 month ago

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