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Chemistry
Tutor: None Selected Time limit: 1 Day

A unit cell of the cubic system has three atoms of an element A inside the cell and twelve atoms of A along the edges of the cell. There are eight atoms of B on the faces of the cell and eight atoms of B at the corners of the cell. 

How many atoms of A are there in the unit cell? 

Dec 5th, 2014

3 inside

12 along 12 edges = 144

8 on 6 faces = 48

8 at 8 corners = 64

3 + 144 + 48 + 64 = 259

Dec 5th, 2014

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