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0.5

0.5

11

1

1

0.51

0.51*

0.5

0.5

0.25

1

11

0.25

0.5

1

0.51.5

0.50.51

0.51

0.51

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"." technos .43 "". . 96 97 Emilio Segr Carlo Perrier 1937 .

:9697 .1 2 9742 1 43 AZMo H Tc X .X .ZA

99 / .2. . .99

-2 -1 .3. MeV99 .4. .99Tc99Mo .599Mo .2.7599 .6

jours-1 s-1..a0= 1,75.1016bqt=099Mo .7

. a ..t=0 .. 5 .

R2R1

C GLX UC k t=01 K .

. .R2 2R2=10 K:R1=5 K

-I K) 1(.. .1B .:+B/UC= Ae-t .2.A.B .3.C .4.t=4s .5-II t=6sK 2.

.UC .1.m UC= E.e-mt.2.C . .3.t=8st=6s .4

4

2

6

2 4 6

t(s)

UC(V)

8 10

((u

999943Tc

98.88235

999942 Mo

98.88437

01e

0.00055

10n

1.00866

11 p

1.00728

1u =1,66 10- kg = 931.5 MeV.c-

1eV = 1.6 10-19 J

VEI0

R1

K1

2

R2UCE UR

I.pH (NH4++Cl-) C=10-2mol.L-1 .pH1=5,6225

. +NH4 .1. .2. . .: .3 .25 K1 .4

II. 37 =14,99 10-2 S.m-1.: .1 4 3 43NH Cl H O NH.( ) [H O ].( )C ..pH2=5.4437 pH +H3O .2.372 .3.37K2 .4.+NH4 .5. +NH4 .6

:S.m2.mol-1 3H O = 35. 10-3S.m2.mol-1 4NH = 7,35.10-3S.m2.mol-1 Cl = 7,63.10-3

3

1

[ ]H O

C