abelikova O
e(O)=8
p(O)=8
n(O)= 8 (16-8)
C
e(C)=6
p(C)=6
n(C)=6 (12-6)
B
e=5
p=5
n=5 (10-5)
As
e=33
p=33
n=42 (75-33)