:
N 15
1. ( ), NaCl l. Na 23 /, Ca 40 /, Cl 35,5 /.
2. ,
(Na = 1017 3), 20 , 0,59 me, mp = 100 2×1×1, E v + 0.045 .
3. , dn (E) E E + dE ( ) T =0 : ) ; ) .
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N 16
1. = 0 , , . , a = 5.58 A.
2. 25 T 1= 10 T 2= 20 , 0,80 . J , ,
1, 2 << J. m = 63 /.
3. , ( ).
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N 17
1. 400 1,38×1015 3. , , 0,785 .
2. 120 25,7 38,2 . , , . (mn = bmp) : mn = 1.45×103 2/(×), b = 2.9. r Si = 2,33×103 /3, m Si = 28×103 /. m P = 31×103 /,
m Ga = 70×103 /
3. , -
t n -.
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