asked 84.1k views
0 votes
Ght

#of
# of
Element
symbol
| # of
neutron
Atomic
mass
proton
electron
or
s
Co
A
B
49
C
27
D
73
31
G
H
58
115
181
|
Ba-2
137
16
18
16

1 Answer

3 votes

Answer 78

Step-by-step explanation:

omg long

answered
User Alex Riley
by
8.3k points
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