Separar os isotopos em uma app própria #399

[HenriqueCCdA]

close #399

[github-actions[bot]]

Test Result (Python 3.8)

706 tests  +5   706 :heavy_check_mark: +5   3m 25s :stopwatch: ±0s     1 suites ±0       0 :zzz: ±0      1 files   ±0       0 :x: ±0 

Results for commit 229e78b1. ± Comparison against base commit fb140cc2.