FUND. OF PHYSICS (LL)-W/WILEY+NEXTGEN(2)
FUND. OF PHYSICS (LL)-W/WILEY+NEXTGEN(2)
11th Edition
ISBN: 9781119787235
Author: Halliday
Publisher: WILEY
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Chapter 41, Problem 3Q
To determine

To find:

the number of atoms per unit cell for silicon.

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What is the relationship between the length of the face diagonal and the radius, r, of the atoms in the cell? (Enter a mathematical expression.) face diagonal =          (c) How is the radius of the atoms related to  do?  (Enter a mathematical expression.) r =          (d) Gold metal crystals have an FCC structure. The unit cell edge in gold is 0.4078 nm long. What is the radius (in nm) of a gold atom?    nm
(a) How many silicon atoms are there in each unit cell? (b) How many silicon atoms are there in one cubic centimeter? (c) Knowing that the length of a side of the unit cell (the silicon lattice constant) is 5.43 Å, Si atomic weight is 28.1, and the Avogdaro's number is 6.02 × 10²3 atoms/mole, find the silicon density in g/cm³.
A Pentium IV microchip has dimensions of 217 mm x 217 mm. Suppose each transistor on the chip is made up of a 10 x10 square of atoms (that is 100 atoms per transistor). How many transistors could fit on the Pentium IV chip if the spacing between the silicon atoms is 0.54 nm?
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