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The energy of the electron in the first orbit of $H{e^ + }$ is $ - 871.6 \times {10^{ - 20}}J$. The energy of the electron in the first orbit of hydrogen would be

• A
  $ - 871.6 \times {10^{ - 20}}J$
• B
  $ - 435.8 \times {10^{ - 20}}J$
• ✓
  $ - 217.9 \times {10^{ - 20}}J$
• D
  $ - 108.9 \times {10^{ - 20}}J$