Table 1-1
Hydrogenn = p-1 n = pn = p+1
  H 001
99.985%

Stable
1.0078250
  n 001
Helium  H 002
0.015%

Stable
2.0141017
 
  He 003
0.000137%

Stable
3.0160293
  H 003
12.33 yr
B-
He-3
3.0160492
   He 004
99.999863%

Stable
4.0026032
 


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