The sample of Ax, is a B emitter, has an activity of 0.1 pCi. In 17 days, the activity of the sample has declined to 0.0625 µCi. What is the half-life (in days) of Ax? Enter values only with 2 decimal places
The sample of Ax, is a B emitter, has an activity of 0.1 pCi. In 17 days, the activity of the sample has declined to 0.0625 µCi. What is the half-life (in days) of Ax? Enter values only with 2 decimal places
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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Transcribed Image Text:The sample of Ax, is a B emitter, has an activity of 0.1 µCi. In 17 days, the activity of the sample has declined to 0.0625 µCi. What is the half-life (in days) of
Enter values only with 2 decimal places.
Transcribed Image Text:Periodic table of the elements
Alkali metals
Halogens
Alkaline-earth metals
Noble gases
group
1*
18
Rare-earth elements (21, 39, 57–71)
and lanthanoid elements (57-71 only)
Transition metals
1
1
H
Other metals
2
13
14
15
16
17
Не
Other nonmetals
Actinoid elements
6.
3
2
Li
4
7
8.
10
Ве
B
C
N
F
Ne
18
11
3
Na Mg
12
13
14
15
16
17
3
4 5 6 7 8 9
10
11
12
AI
Si
S
CI
Ar
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
4
K
Ca
Sc
Ti
V
Cr
Mn
Fe
Co
Ni
Cu
Zn
Ga
Ge
As
Se
Br
Kr
37
5
Rb
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
Sr
Y
Zr
Nb
Мо
Tc
Ru
Rh
Pd
Ag
Cd
Sn
Sb
Te
55
56
57
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
s Ba La Hf Ta w Re
Os Ir Pt
Pb Bi
Та
Au
Hg
TI
Ро
At
Rn
88
110
87
7
Fr
89
104
105
106
107
108
109
111
112
113
114
115
116
117
118
Ra
Ac
Rf
Db
Bh
Hs
Mt
Ds
Rg
Cn
Nh
Mc
Lv
Ts
Og
58
lanthanoid series 6
63
64
66
68
59
60
61
62
65
67
69
70
71
Се
Pr
Nd
Pm
Sm
Eu
Gd
Tb
Dy
Но
Er
Tm
Yb
Lu
90
actinoid series 7
92
93
96
99
100
101
91
94
95
97
98
102
103
Th
Ра
U
Pu
Am Cm
Bk
Cf
Es
Fm
Md
No
Lr
*Numbering system adopted by the International Union of Pure and Applied Chemistry (IUPAC).
© Encyclopædia Britannica, Inc.
19
LO
CO
period
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