234
10.
POSITIVE RAYS AND ISOTOPES
The small differences between the nuclear masses
and the integers
Will be considered in the next section.
—
10—12.
The Binding Energy.
Stability of N uclei.—The binding energy
of the nucleus of an atom is the difference between its
:______.—_—____
O
8
O
0
90
“°
OŒ
o
8
0
O
0
O
0
89068 O
80
0
g
0
00
0
°
8
0
000
0
,
038
0
70
0
ë@O
0
008
o
g08
l
090
0
Î60
o
800
2
O
800
O
0
O
0
0
m
o
8 8
Lil
008 0
D“
50
00008 0
8
0
8°8
'
Q
000
U)
—
()
oao
"'
'
0.8 0
0
000
o
000
.
008
‘
0.0
008
—
——'08—‘—0
'
‘
o
30
'
40
50
60
2
F1G. 10—11.
Some of the stable isotopes.
nuclear weight and the sum of the weights of the lighter particles of
which it 1s'supposed to be formed. Consider the isotope Li6; i-€-a
a
lithium atom whose nucleus has a mass number of 6 and a
charge of + 3. Assume that its nucleus consists of three protons
and three neutrons, whose free masses are 3 >< 1.0081 = 3.0243