Isotope
Excess of mass
of atom
Ar - A, a.m.u.
Isotope
Excess of mass
of atom
Ar - A, a.m.u.
0
n
0.00867
6
0.01143
1
HI
0.00783
C12
0
H2
0.01410
C12
0.00335
H3
0.01605
7
N [13
0.00574
2
He3
0.01603
INP4
0.00307
He'
0.00260
1\115
0.00011
3
Lie
0.01513
8
015
0.00307
Liz
0.01601
012
-0.00509
4
Bel
0.01693
017
-0.00087
Be'
0.00531
9
FI9
-0.00160
Beg
0.01219
10
Ne 20
-0.00756
Be"
0.01354
11
Na23
-0.01023
5
Blo
0.01294
Na 24
-0.00903
0.00930
12
Mg24
-0.01496
Note. Here Ar is the relative atomic mass (in a.m.u.), A is the
mass number.
25. Ionization Potentials of Atoms
Z
Atom
Ionization potential
cp, V
Z
Atom
Ionization potential
cp, V
1
H
13.59
7
N
14.54
2
He
24.58
8
0
13.62
3
Li
5.39
9
F
17.42
4
Be
9.32
10
Ne
21.56
5
B
8.30
11
Na
5.14
6
C
11.27
80
Hg
10.44
26. Mass of Light Atoms
27. Half-Life Values of Radionuclides
Z
Isotope
Kind of decay
Half - life
27
Cobalt Con
13
5.2 years
38
Strontium Sr20
13
28 years
84
Polonium Po210
a
138 days
86
Radon Rn222
a
3.8 days
88
Radium lia226
a
1620 years
92
Uranium U238
a
4.5.109 years